The Backbone One for iOS is designed specifically for use with iPhones and does not support connection to tablets. It is optimized to work with iPhone models, utilizing the Lightning port and other iPhone-specific technologies to ensure seamless gaming experience.

Only for phones, this version here is even only for iPhone with Lightning connection

I can't confirm this, but it should actually work because ipad os and ios work pretty much the same way.

I think so, give it a try!

No The backbone app uses an annual mobile phone plan to play (49fr) annually and then accesses the app. You could also bypass this

No. The product is intended for iPhones.

Yes, your iPhone 13 Pro Max fits on the Backbone One for Xbox without an additional adapter.

That's right :)