How can I get scheduled gate departure time vs the scheduled wheels off time?

FlightAware fire hose feeds (or GET API) always sends the scheduled wheels off time as the scheduled departure time. How can I get the scheduled gate departure time ?. If I go to flightaware.com and use my tail/fin number I can see both scheduled gate departure and scheduled wheels off departure time.

Any way for FlightAware fire hose or API to get scheduled gate departure time ?
Thanks in Advance.

The out’s and in’s would be the values you are looking for for gate departure and gate arrival, when available.

“scheduled_out”: “2021-12-31T19:59:59Z”,
“estimated_out”: “2021-12-31T19:59:59Z”,
“actual_out”: “2021-12-31T19:59:59Z”,
“scheduled_off”: “2021-12-31T19:59:59Z”,
“estimated_off”: “2021-12-31T19:59:59Z”,
“actual_off”: “2021-12-31T19:59:59Z”,
“scheduled_on”: “2021-12-31T19:59:59Z”,
“estimated_on”: “2021-12-31T19:59:59Z”,
“actual_on”: “2021-12-31T19:59:59Z”,
“scheduled_in”: “2021-12-31T19:59:59Z”,
“estimated_in”: “2021-12-31T19:59:59Z”,
“actual_in”: “2021-12-31T19:59:59Z”,

Scheduled US airlines should publish the scheduled in and out times, since they’re required to report ramp delays to DOT. Not sure about the ones that are technically “scheduled charters” (e.g. Sun Country) nor anyone else.