Expanding Designed for Xbox Mobile Accessories to iOS Devices - Xbox Wire
How to use a PS4 or Xbox One controller with iOS 13 and iPadOS
Backbone One iOS Gaming Controller for iPhones
How to connect your PS4 and Xbox One Controller to an iPad or iPhone on iOS 13 | AppleInsider
Amazon.com: Razer Kishi Mobile Game Controller / Gamepad for iPhone iOS: Works with most iPhones – X, 11, 12, 13, 13 Max - Apple Arcade, Amazon Luna, Google Stadia - Lightning Port Passthrough - MFi Certified : Video Games
Apple's Xbox and PS4 controller support turns an iPad into a portable game console - The Verge
How to connect PlayStation controller or Xbox game controller to iPhone and iPad
How to Connect Xbox One Controller to iPhone or iPad | OSXDaily