Change output json body http request post

Hi all, i am very new to JSON and i was asked to create a flow in Power automate, with an email being send. But so far so good. Only i have isues with the outcome into the email, and i am stuck in the strings,

So the question is how can i for example change the date format from a string? or am i looking completly in the wrong direction?

it is i think about this part
“item/Date Call Occurred_x003a_”: {
“type”: “string”

{
    "type": "object",
    "properties": {
        "inputs": {
            "type": "object",
            "properties": {
                "host": {
                    "type": "object",
                    "properties": {
                        "connectionName": {
                            "type": "string"
                        },
                        "operationId": {
                            "type": "string"
                        },
                        "apiId": {
                            "type": "string"
                        }
                    }
                },
                "parameters": {
                    "type": "object",
                    "properties": {
                        "source": {
                            "type": "string"
                        },
                        "drive": {
                            "type": "string"
                        },
                        "file": {
                            "type": "string"
                        },
                        "table": {
                            "type": "string"
                        },
                        "item/Link to the Recruiter Script Call_x003a_": {
                            "type": "string"
                        },
                        "item/Duration of Recruiter Script Call_x003a_": {
                            "type": "string"
                        },
                        "item/Recruiter Name_x003a_": {
                            "type": "string"
                        },
                        "item/Consultant Candidate Name_x003a_": {
                            "type": "string"
                        },
                        "item/Date Call Occurred_x003a_": {
                            "type": "string"
                        },
                        "item/Date Call Uploaded_x003a_": {
                            "type": "string"
                        },
                        "item/Date Assessment Completed_x003a_": {
                            "type": "string"
                        },
                        "item/Consultant Candidate Technology_x003a_": {
                            "type": "string"
                        },
                        "item/Candidate Stage At Time of Audit": {
                            "type": "string"
                        },
                        "item/Recruiter Tonality_x003a_": {
                            "type": "string"
                        },
                        "item/Comment Recruiter Tonality_x003a_ (Auditor Input)": {
                            "type": "string"
                        },
                        "item/Candidate Tonality_x003a_": {
                            "type": "string"
                        },
                        "item/Comment Candidate Tonality_x003a_ (Auditor Input)": {
                            "type": "string"
                        },
                        "item/Recruiter's Ability to Not Sound Like a Script_x003a_": {
                            "type": "string"
                        },
                        "item/Comment Recruiter's Ability to Not Sound Like a Script_x003a_": {
                            "type": "string"
                        },
                        "item/Recruiter's Ability to Sell the Role_x003a_": {
                            "type": "string"
                        },
                        "item/Comment Recruiter's Ability to Sell the Role_x003a_": {
                            "type": "string"
                        },
                        "item/Recruiter's Ability to Answer Ad Hoc Questions_x003a_": {
                            "type": "string"
                        },
                        "item/Comment Recruiter's Ability to Answer Ad Hoc Questions_x003a_": {
                            "type": "string"
                        },
                        "item/Recruiter's Understanding of Our Business Model_x003a_": {
                            "type": "string"
                        },
                        "item/Comment Recruiter's Understanding of Our Business Model_x003a_": {
                            "type": "string"
                        },
                        "item/Candidate's Fit for Role Based on Script Conversation_x003a_": {
                            "type": "string"
                        },
                        "item/Comment Candidate's Fit for Role Based on Script Conversation_x003a_": {
                            "type": "string"
                        },
                        "item/Recruiter Communicating Nationwide~1EU Travel Effectively_x003a_": {
                            "type": "string"
                        },
                        "item/Comment Recruiter Communicating Nationwide~1EU Travel Effectively_x003a_": {
                            "type": "string"
                        },
                        "item/Recruiter Communucating Financial Commitment Effectively": {
                            "type": "string"
                        },
                        "item/Comment Recruiter Communucating Financial Commitment Effectively": {
                            "type": "string"
                        },
                        "item/Recruiter Communucating Marketing Requirements Effectively_x003a_": {
                            "type": "string"
                        },
                        "item/Comment Recruiter Communucating Marketing Requirements Effectively_x003a_": {
                            "type": "string"
                        },
                        "item/Recruiter Communucating Compensation Effectively (Project Rate, Bench Rate, Performance Reviews)_x003a_": {
                            "type": "string"
                        },
                        "item/Comment Recruiter Communucating Compensation Effectively (Project Rate, Bench Rate, Performance Reviews)_x003a_": {
                            "type": "string"
                        },
                        "item/Overarching Themes Needing Improvement (Auditor Input)": {
                            "type": "string"
                        }
                    }
                },
                "authentication": {
                    "type": "string"
                }
            }
        },
        "metadata": {
            "type": "object",
            "properties": {
                "01WFVSMDNHUOXHSZLOYVGYXA342IR6ELIY": {
                    "type": "string"
                },
                "operationMetadataId": {
                    "type": "string"
                },
                "tableId": {
                    "type": "string"
                },
                "01COVRL6QGVEZQSAJHEFBYXBNIJCHWSKU7": {
                    "type": "string"
                }
            }
        }
    }
}