Did you buy Minecraft through Mojang before Microsoft forced account migrations?
Some folks are working on a class action lawsuit against Microsoft because of people being locked out of playing the game they paid for, just because they didn't migrate their account in time. And because of constant updates to the terms and services without proper notice given to customers.
Whether or not you lost access to play Minecraft which you paid for, please consider adding your info to their surveys:
Google Form (US based form provider, data stored in the US with questionable protections / privacy): https://kianbrose.com/form
Formbricks (EU based form provider, data is stored in EU jurisdiction with adequate protections, according to youtuber Kian Brose): https://kianbrose.com/form-secure