Should https://www.openstreetmap.org/way/749787582 be a driveway at the north end (down to the gate, or just before), and then a footpath?

If so, the convention for this is to
1. split the way
2. make the north end highway=service service=driveway foot=designated designation=public_footpath prow_ref=(as is)
3. add access=private to the driveway if vehicular access is private
4. make the south end highway=footway foot=designated designation=public_footpath prow_ref=(as is) and remove the service=driveway from it

Then the vehicle and foot access tagging should be correct for both parts of the footpath, and the ‘type’ of highway should also be correct.

Or I could have misinterpreted what you were trying to do here. Let me know! :)