Amazon.com: Hyperkin SmartBoy Mobile Device for Game Boy/ Game Boy Color (Android USB Type-C Version) : Video Games
Best Game Boy & Game Boy Advance Emulators for Android 2022 | Android Central
The best mobile emulator is for Gameboy-GBc/Gameboy Advance, "Pizza Boy" amazing, you should definitely check it out, the emulation itself is nearly perfect as well : r/emulation