Does the iPhone support Nintendo Joy-Con controllers? How can I connect Nintendo Joy-Cons to iPhone / iPad?

Yes, Apple devices running iOS 16 or later can connect to Nintendo Joy-Con gaming controllers and the Pro Controller.
The iPhone is compatible with single Joy-Cons or both Joy-Cons when used as a single controller. Nintendo Joy-Cons are connected to the iPhone via Bluetooth settings.
Several additional wireless gaming controllers are compatible with iOS 16 or later, including the Xbox Series X and PlayStation 5.tags: