Of course, happy to help if i can. I’m sure we’ll get it to work eventually, darn technology and all 
Check this Post here:
There’s some instructions there as well. I’ve managed to get it working with AUM and a Moog App.
If there is anything else i can help with, just let me know. 
As far as MIDI Keyboards go, the Arturia Minilab is pretty handy, but as you mentioned, USB Power Delivery is not there. But it works well if you use a powerbank and a regular MIDI Jack cable.
Definitely not as small and portable as a phone or tablet though