Ignoring cracks/illegal routes, I'm not sure you can
Microsoft deleted any remaining Minecraft accounts that were not migrated to a Microsoft account 2 years ago now. Any accounts remaining are now solidly Microsoft accounts with Minecraft access. Unless for some reason the android and apple license system was exempted, If you never ported your account, you no longer own a license to use Minecraft.
Its BS that they were allowed to do this but, that's the state of the situation.
Any legitimate/legal launcher that you find for Minecraft is going to require you to sign into a Microsoft account to use it, ~~as they require account authentication to download the library files and~~ the old Mojang account system that the original system used no longer exists.
you mentioned PovavLauncher. That's a minecraft launcher as well, they don't provide libraries for the game, and instead have you sign into a MS account so they can pull the files directly from microsoft.
edit: Apparently the requirement to have an account to download the files isn't actually correct. It's just they require you to have a license to use Minecraft if you're going to download them. I don't feel like it was always this way but it currently seems to be that way with my testing.