Wireless controller support on the Android platform has been around for some time, with the DualShock 4 and Xbox One Controller being the two most widely supported controllers. Recently though, it was discovered that the Nintendo Switch Pro Controller was also added to that list.
According to Android Police, Google had quietly added full support for the controller to the Android 10 platform. Prior to this, the Switch Pro Controller could be paired up to an Android device but lacked the proper button mappings to ensure proper functionality.
The current version of Android 10 remedies that by including the necessary button mappings for the Switch Pro Controller and allowing users to finally play mobile games with the device. Mario Kart Tour on mobile currently lacks controller support but if Nintendo ever decided to include it in a future update, having a Pro Controller around would actually be pretty handy.
In any case, pairing the Switch Pro Controller to a smartphone running on Android 10 shouldn’t be anymore difficult than pairing another Bluetooth controller. In this case, you simply need to hold down the pair button and ensure your phone’s Bluetooth is turned on.