There are also cases of false assumptions being made about wheelchair users - e.g. they have full hand function, that they aren’t heavy etc. There have been a number of times my dad’s been trapped in lifts because you need to press the small lift buttons (he doesn’t have fine hand control) and the lift can’t carry him (a fully-grown, slightly overweight man) his electric wheelchair (built in the 1980s), and a button-pusher, due to weight restrictions or space in the lift car.
Yes, those are all also things that can cause access features to be inaccessible.
Sometimes these things are designed as though all people who need flat entrances and lifts are all either little children, accompanied by able-bodied people, or 20-something paraplegic athletes who use lightweight manual chairs.
And that’s really not the reality.