Ok, so I just want minecraft java edition running on my Retroid Pocket Flip 2. Which from a hardware perspective is identical in everyway to the Retroid Pocket 5.
I can use Game Native to get PC games running.
My device also came with PovavLauncher. I don’t know what it does, but it’s minecraft related. Although it appears to be an android app.
Does anyone know where I should look for a guide?
You can run the game without a Microsoft account if you use a third party or custom launcher/entrypoint. Downloading and updating it is another story. Just speaking from Linux gamescope and curseforge experience. Not exactly sure about your case.