With COVID my grandfather has been doing telepresence visits with his doctors, for COVID among other reasons.
Mostly they were using a 3rd party solution like webx/zoom/etc but one doctor (automated in an online form) noticed his number was tied to iMessage and offered to just FaceTime him at his appointment time. Super easy for him (at 94) to self-manage vs any other solution where we (my mother or myself) need to be around to set things up for him.
Not sure how they are doing this exactly, if this is something Apple specifically enabled for healthcare or whatever, but its a fantastic experience.
Whatever solution they were using did have an "no I have an android and a 'use my computer' option" not sure what path they led down.