I downloaded the launcher from the minecraft page through this link:

https://www.minecraft.net/en-us/download

once installed I entered my microsoft account and it appears

Java: Play demo

Bedrock: Play, but before it appeared to install

Dungeons: Play, but before it appeared to install

It is necessary to clarify that I have never bought any version of the game from any site and in any way, neither in the playstore, nor in the official mojang page, nor in the microsoft store and not from the launcher. I just installed the launcher out of curiosity.

Both minecraft bedrock and dungeons allow me to play them with all their functions even with the option to buy dlcs, but only on one computer, I tried it on another and it appears to buy and not to install, even when I use the same email, I make this report to know if it is an isolated error, someone else had access to my account, and so that they do not block my account or something similar

Thanks

Update: 
I have never bought the xbox gamepass, neither for the console or pc