@AGBD2000 yea it is, if you blow up the plane you can see it.
@Shadow251 1. I agree it's weird that noone else reported on this, I had the same problem (although it must have happened during one of the last changes, worked fine all the time until the final version it seems). I uploaded a fixed version (1.1).
2. Problem is that rotation is limited to 90° and 90° only. While that works for the F/A-18 and F-35C, it really doesn't on this due to the wing size. Having the large wings only go up by 90° makes the aircraft pretty darn large (in terms of height).
Ah new and better version is now available here: https://www.gta5-mods.com/vehicles/su-57-felon-t-50-pak-fa-add-on
@Akoutw sounds like you are missing the vehiclelayouts file.
@Lapd Code 3 yes, you enter it just like any normal vehicle. The player will turn invisible upon entering.
@James_DEV It's a FiveM problem, better ask in those forums
@F5544 it's hardcoded. You can't do it in singleplayer without a Script.