I use the following code to create an event in my calendar
Set(_myCalendarID, LookUp(Office365.CalendarGetTablesV2().value, name = "Calendar").id);
Office365Outlook.V4CalendarPostItem(
// lookup user's calendar
_myCalendarID,
// subject of meeting
"Work Space OPP " & workspaceNo & " reserved ",
// The time the reservation started
DateAdd(startTime, TimeZoneOffset(), Minutes),
// The time the reservation ended
DateAdd(endTime, TimeZoneOffset(), Minutes),
//The timezone for the reservation
"(UTC) Coordinated Universal Time",
{Location: "OPP 7/F " & workspaceNo, Importance: "Normal", ShowAs: "Busy"}
);
and use the following code to get the event id and save it to SharePoint list and field name is EventID
Set(_eventID,Last(Sort(Office365Outlook.V4CalendarGetItems(_myCalendarID).value,createdDateTime)).id);
When I try to delete the event I use this code. But powerapps was looking for event instead of eventID
Office365Outlook.CalendarDeleteItemV2(_myCalendar, ThisItem.EventID);

How can I get the event of the calendar item ?