Of course it responds to MIDI, not sure about endless increment messages, depends on the hardware, but you’ll get the best resolution if you get a controller which can send nrpn 14bit messages, regular 7bit might be all you need, but e.g the Lemur app would allow you to configure both to whatever config you wanted, plus you can exploit the USB port and leave those din plugs for clock etc
The camera connection Kit does the business just fine, plus you could use a raspberry pi as a host ‘hub’ for no money or footprint, so you still have DIN free with minimal gear