Football Manager 2021 Xbox Edition

Pick Iceland as your starting country

Choose Fjornir as your team, and you can just go on vacation for the rest of the season, and you should end up in the top 2.

There is RNG in this solution, so you can lose a few matches and not get the promotion, but this solution is fairly reliable

You can also get National Hero and Clean Bill of Health in the same playthrough.

If you downvote, please, tell me why in the comments so I can improve this solution