Nintendo has never released an official beta version of Super Mario Maker 2 for Android devices. The game is exclusively available for Nintendo Switch. Any website, video, or APK claiming to offer a "Super Mario Maker 2 beta para Android" is likely fake, a scam, or contains malware. There are, however, unofficial fan-made clones and emulation methods that attempt to replicate the experience.
Si por error instalaste un APK sospechoso: como descargar super mario maker 2 beta para android