Apple Pay Double Click Stopped Working Working

If you go into Assistive Touch and scroll down to >Confirm with Assistive Touch< and if it’s enabled, turn it off. Now you should be able to use Assistive Touch for other functions and it won’t interfere with the function of the side button.

Turn Assistive Touch off. Check if Confirm with Switch Control or Confirm with Assistive Touch is Enabled in Side Button.

You’re welcome. I hope you have a great weekend!