When vital buttons on one of my Joy-Cons stopped working, I managed to find a way to use it again by remapping the controller.

Ensure Your Controller Is Charged Before diving into complex solutions, ensure your controller has sufficient battery power. Switch 2 Joy-Con controllers need to be inserted into the console to ...

There are some issues with the Nintendo Switch's Joy-Con controllers that can interrupt play. Here is how to fix those issues.

Presuming you have more than one Joy-Con accounted for (or a different controller entirely), finding its missing partner might be inconvenient but not impossible.

Old Joy-Con, the Pro Controller, and various classic controllers (like the NES, Super Nintendo, Nintendo 64, and Sega Mega Drive replicas) work on Nintendo Switch 2, though there are some limitations.