I love this! I’ve been looking for something with a solenoid I love the half-num-row and the knob. It seems like a really fun board!
With it being Pro Micro powered, would that allow a nice!nano to work as well? I’m nearly all in on ZMK at this point, so that would be a great plus.
Yes, it will be able to be powered by the nice!nano HOWEVER (and this is a big list of caveats) solenoids use a LOT of juice that the nice!nano won't like, the electromagnetic ****ery of the solenoid itself might interfere with wireless connection, you'd need a beefy battery, and I don't think that ZMK supports solenoids currently.
If you don't want to use the solenoid, sure, the nice!nano would work.
That being said, the real answer is "yes, but also no"