Can you try in Isadora 4.1.3 (the most recent public version)?Can you try with the legacy version of Rokoko Studio?Are you working with a Rokoko SmartSuit Pro II, or the first version of the Rokoko SmartSuit Pro?
I've used IOS Screen Mirroring to a Mac. There's an app called True Visage that hides all the phone's camera settings, just sends what the camera sees, which is handy.