Agree, not making a port for Xbox felt like punishment for the BC program.
Nah, not necessarily a port. The differences between the PS4 and 360 versions playable via BC, are minimal, and mostly come down to the framerate, to fund an entire port.
Just unlock the default 30 FPS on the 360 version to 60 or unlimited for Series S|X, and it automatically becomes the definitive version to play, with online multiplayer.
All it takes is a patch, that's too much for these greedy fucks.