Lightbulb moment! ..
I’ve been using my old iPhone 5 with an AudioQuest Dragonfly Cobalt Blue with ROON and TIDAL to get MQA.
I have never been able to get ROON to Group it .. until now.
One quick flick of a sliding switch in the Device Setup of ROON and quicker than you can say “ .. Group me now .. “ .. I can now use my iPad (and 2nd iPhone) as a controller for the iPhone. It makes such a difference not having to do that on the iPhones itsy-bitsy, teeny-tiny screen.