I've been invited to join a Zoom call later - that'll be a first, and should be interesting.

With Moto it all depends on your starting point. If its on standby with the widget thing showing (time date & battery) then when you get a call its the up or down swipe. If your standby shows your home page ( some wallpaper + quick entry app buttons) then its answer or reject. Why do I know this gem of information? because I was daft enough to bugger about with some of the settings until the penny dropped.
Not true I'm afraid, they collect technical and interaction data by default. You do, however, have the option to turn this off.
One would assume so, they wouldn't be collecting it otherwise