I bought the game in 2020 if I'm not mistaken when I was using my old computer, but now when I bought a new computer and went to install Minecraft Dungeons, the launcher says that I need to buy the game again

I bought it at minecraft.net with my Mojang account, I searched for a tutorial to fix it, and in the comments section a lot of people are having the same issue and no one managed to fix it!

Help!