Just saw a Mastodon post about a Game Boy Advance emulator now available on the App Store (I am in no way affiliated with it). I tried it on my iPad with a couple ROMs and it worked.
iGBA: GBA & GBC Retro Emulator
iGBA: GBA & GBC Retro Emulator stands as a remarkable, lightweight retro emulator tailored to transport you back to the golden era of gaming with the legendary Game Boy family. This emulator is a virtual gem that allows you to relive your cherished childhood moments with classic Game Boy, Game...
apps.apple.com