Events are not loading into the webix scheduler calendar

I want to show events in webix scheduler UNIT view But events are not getting displayed on calendar. My url is fine and receiving a successful response from the server with the data I need for the events. The response contains an array of events, and each event object has properties such as id, title, start, end, and url.

JSON response and code

var data = {
  "response": "success",
  "events": [
    {
      "id": 46,
      "url": "",
      "title": "Jeremy Madison",
      "start": "2023/09/28 09:45:00 AM",
      "end": "2023/09/28 09:45:00 AM",
      "extendedProps": {
        "calendar": "business",
        "model": {
          "id": 46,
          "appointment_type": "medical",
          "user_id": 1,
          "service_id": 1,
          "company_id": 1,
          "patient_id": 20,
          "location_id": 1,
          "time_id": null,
          "start": "2023-09-28 09:30:00",
          "end": "2023-09-28 09:45:00",
          "time": "9:30 AM",
          "duration": "15",
          "allDay": 0,
          "appointment_alert": null,
          "frequency": "1 day",
          "status": 0,
          "created_at": "2023-08-04 15:08:41",
          "updated_at": "2023-08-04 15:08:41",
          "policy_holder": null,
          "location": "peshawar",
          "code": "34214",
          "payer_name": null,
          "mobile_no": "+1 (907) 769-9091\n",
          "dob": "2006-10-23",
          "admin_sex": "female",
          "clinician_name": "Sudais Khan",
          "patient_name": "Jeremy Madison"
        }
      }
    }
  ]
}
webix.ready(function () {
    webix.CustomScroll.init();
    var id = 1;
    var apiUrl = "schedules?nid=" + id;
    var eventsLoaded = false;
    var scheduler = webix.ui({
       view: "scheduler",
       container: "my_schedules",
       id: "myScheduler",
       width: 1000,
       height: 1000,
       save: "rest->" + apiUrl,
       url: apiUrl,
       monthSelect: true,
       weekHeader: true,
       events: new webix.DataCollection({
          scheme: {
             $init: function (obj) {
                obj.start_date = webix.Date.isDate(obj.start)
                   ? obj.start
                   : webix.Date.strToDate("%Y/%m/%d %H:%i")(obj.start);
                obj.end_date = webix.Date.isDate(obj.end)
                   ? obj.end
                   : webix.Date.strToDate("%Y/%m/%d %H:%i")(obj.end);
             },
          },
       }),
       on: {
          onBeforeEventSave: function (id, data, update) {
             if (update) {
                data.start = webix.Date.dateToStr("%Y/%m/%d %H:%i")(data.start_date);
                data.end = webix.Date.dateToStr("%Y/%m/%d %H:%i")(data.end_date);
             } else {
                data.start = webix.Date.dateToStr("%Y/%m/%d %H:%i")(data.start_date);
                data.end = webix.Date.dateToStr("%Y/%m/%d %H:%i")(data.end_date);
             }
          },
       },
    });
    scheduler.attachEvent("onViewChange", function (newView) {
       if (!eventsLoaded && newView === "month") {
          scheduler.clearAll(); 
          scheduler.load(apiUrl, "json");
          eventsLoaded = true;
       }
    });
 });

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