If someone made a screenless powerbank-shaped Android device, I might be interested. The device would double as a 5g wifi modem, and to access the UI you'd remote in over VNC from a laptop, or unrestricted mobile device like a PinePhone.
As to the device you mention, it should be possible to take a phone apart and spoof* all of the mic's and cameras, likely the gps, and haptic motor and speakers as well, and have a 5g touch screen modem with plain internet, or keep the speakers and it's a media device, or put all the audio on a micro switch. * use matched resistors, or black out the sensors detach the antena for gps lets just say I realy dont like bieng advertised to