I'm pretty sure I watched MNF games on ESPN + last year. I just googled it and this came up:
Monday Night Football is exclusive to ESPN and its sister networks, like ABC, ESPN2, ESPN+, and ESPN Deportes. During the 2023 NFL season, you can watch 23 regular season games across ESPN platforms, plus two postseason games and exclusive Pro Bowl coverage.
Take that for what it's worth as things change all the time.