That’s false. I’ve been flying the Longitude almost exclusively since AAU1. I have almost a hundred hours in that aircraft since then.
It 100% toggles between 100 and 1000 feet when “pushed”
In Legacy cockpit control, this is a click in the middle.
In “lock” mode, it’s a right click while locked.
I don’t know what it is in VR, and there is no control bind for it that I could find.