Downloading Switch ROMs from the internet is considered piracy and was a central point in the legal action that led to Yuzu's shutdown. The only legal method is "dumping":

: The official Yuzu website and Play Store listings are gone. However, "frozen" versions of the final build still circulate in communities like Reddit's EmulationOnAndroid and archive sites.

If you own a Nintendo Switch and want to play your library on an OLED phone screen with upscaled resolution?

One night, deep in a Reddit argument about “ethics of emulation,” his phone screen flickered. Yuzu crashed. Then it rebooted. A strange pop-up appeared:

: Currently considered the most active and "exciting" fork. It is optimized for high-end Android devices and often delivers smoother performance than original Yuzu builds, with some users reporting over 70 FPS in demanding titles.

“Nintendo found the ROM site we were using. It’s gone. And someone in the Discord said they got a copyright strike from their ISP. Just… chill.”