In 2022 the NFL changed the OT rules that allow both teams to possess the ball in OT in the post season.

That statement, plus the one below were taken directly from https://operations.nfl.com/the-rules/nfl-overtime-rules/.

"The current rules give both teams the opportunity to possess the ball at least once in overtime. Although, DURING THE REGULAR SEASON, if the team that gets the ball first scores a touchdown on the opening possession, they win."

The bold and CAPS were added by me for emphasis. Now keep in mind my team was not involved in this game but it did happen in a league I run, the USFL. In a Conference Championship Game. https://usflwfl.myfootballnow.com/log/10857

It's bad enough the MFN tiebreakers diverge from the NFL at some point, now we aren't even following the OT rules.