A few days ago @iEddiez has tried to do this, and failed.
The idea is simple, have the ability to add jetways to remote (medium) stands, either as an upgrade button, or as a separate item.
The only real life image I found of this is:
Wikimedia Commons.
Probably because these are relatively rare, but their usefulness is too great to be ignored.
If this simple structure can be squeezed into the regular stand size, it can used used as an upgrade option if the stand is remote.
To achieve this, I suggest that the aircraft should be aligned somewhat diagonally across the stand,
That would allow placing the escalator building (and jetway) in the front corner.
Implementing this as a stand feature and not a bus mechanic would probably be technically easier.
It’s not really a great idea. The whole reason for remote stands is to have 2 stairs + ambulift is needed because they are a faster boarding method and they are significantly cheaper than jetways. These are very rare and I think stairs are much better and optimal.
Some people prefer to have less vehicles, they’re a lot of hassle… It some cases it ends up being slower in game because the stair truck needs to get to the stand from it’s parking (if not assigned to stand).
Also in the game this would end up being cheaper long term, as buildings don’t have running costs.
though these are kind-of outlandish, sophisticated and rare jetway versions, I like the idea! pretty cool addition that’d add a lot of variety, not just regular remote stands.