With the iPhone 14 Pro Max I could tell you that it is good but it is not the most recommended, with the quality at maximum at night and using the a350 in large airports the fps drop to 20 or 13, in that range, in other planes the same, if it is at dusk and for example in the Paris airport the fps drop a lot, sometimes between 25 and 15
These screenshots of the fps are from the Paris airport, but in general it happens with any airport and not necessarily a big one, just the fact that it's 3D already drops the fps too much. At Paris airport the fps drops to 12 (I can't say it's the same with all 14 pro Max) but at least in my case since the last update the game is terrible, I don't know what the developers moved but now it's almost impossible to play in any big airport at dusk or night, the game simply drops to those fps (20-12) apart from that it has many bugs (in my case) like loss of sound if you exit the application, before the terrain rendering was good, now it renders horribly and the fps still drop more than before, or you change your cell phone or change the flight simulator, I think I'll do the second one, those bugs will take too long to be fixed