Chuwi's latest product is one of the smallest mini PCs you can find that doesn't run on a passively-cooled processor. Fan noise, however, is louder than expected. See what we think about this $160 USD crowdfunded project.
https://www.notebookcheck.net/Chuwi-LarkBox-Celeron-J4115-Review-A-4K-Mini-PC-So-Small-It-s-Lighter-Than-Its-Own-AC-Adapter.482467.0.html
Did you only test the USB C port using the AERO gear?
Since not all USB C are made equal, it would have been great if you could have hooked up the PC to a display that allows power and displayport protocol over the same cable. Maybe the usb c port does not support USB data protocols, instead only power and displayport.
Here an example: Lenovo Thinkvision M14 mobile monitor allows charging and displayport through the usb c port, but no usb data.
The USB C port does not even support power delivery, so no power bank will work. This is a fixes 12v/2A, so I would be surprised this can support video...