Here's a custom test league I created with the 130 FBS teams. I roll over into the 2023 season (although the game screen shows (February 1, 2022). When I go to import the custom schedule, I get a popup that says "Florida State must play 11 games". On my custom schedule, they're scheduled for 12 games.
This is a fairly big issue. For League Format = "Custom", the game needs to accept the schedule as entered regardless of how many games each team plays, as opposed to the fixed constraints imposed by default League Format = "NCAAFBS"