When you turn on the Minecraft launcher, the Microsoft Account Migration window came out - I did everything as it should, but in the end I wrote that I did not buy the Minecraft Java Edition game, although this game was available on my account before (it was purchased from the official Mojang website! No third-party stores).

The username is momlynx (nickname pepelitsa).

Tell me, what should I do? Where the purchased game disappeared.