Okay, so I got it to work on an iPad the other day. You have to set up as usual on one of the fully featured apps like android or Windows and then log in on ios and select external player (vlc). You can also save the page as an app to your home screen.
works great on ATV tvos. Worth the $10 for the pro version which allows real-debrid Api key use connected to streamio and other sources.... pair with infuse pro and your ATV will be set