Parsing API Response in Python For AWS API

I am trying to use describe_target_health api of BOTO3 to get Target Details under some account. API Response is like below

{
"TargetHealthDescriptions": [
    {
        "Target": {
            "Id": "arn:aws:lambda:us-west-2:123456789012:function:my-function",
            "AvailabilityZone": "all",
        },
        "TargetHealth": {
            "State": "unavailable",
            "Reason": "Target.HealthCheckDisabled",
            "Description": "Health checks are not enabled for this target"
        }
    }
      "Target": {
            "Id": "arn:aws:lambda:us-west-2:213242434:function:my-function",
            "AvailabilityZone": "all",
        },
        "TargetHealth": {
            "State": "unavailable",
            "Reason": "Target.HealthCheckDisabled",
            "Description": "Health checks are not enabled for this target"
        }
    }
]
}

Trying to fetch all Target Id from above response like below

for tg in tg_arn_list:
                    response=lb_client.describe_target_health(TargetGroupArn=tg)
                    # print("---PRINTING RESPONSE---")
                    # print(response4)
                    tg_dict={}
                    for t in response['TargetHealthDescriptions']:
                        tg_main_list.append({
                            "Id":t['Target'].get("Id","NA"),
                            "HealthCheckPort1":t['Target'].get("Port","NA"),
                            "TargetHealth":t['TargetHealth'].get("State","NA"),
                            "TargetGroupArn":tg
                        })

But this loop is skipping 1st Target only fetching Target 2, can someone help with required changes to be done in code.