My spouse is unable to negotiate more than a few stairs and can’t walk for extended lengths, do we always order a wheelchair.

We’ve utilized 5 Star at MIA, LHR, LAX, DFW, PHL, ORD. We have gotten a cart a number of times, but never a vehicle transfer. I understand that Flagship lounges usually have an elevator to the tarmac. Once at the a/c, is there another elevator back up to the jetway?