Hi folks,
Just recently, possibly with an update to iOS or Stadia, on my iPad web app Stadia doesn't recognise my bluetooth Xbox One controller. If I open Stadia in Safari it works perfectly but the Safari web app doesn't seem to detect that a controller is connected.
@beardybone can you confirm which version of iOS your iPad is running right now? Also which model of iPad? I can try it with my ipad later today.
Have you tried reinstalling the web app after updating the iOS? Also, are you using the official Xbox one controller?