Split Keyboard with only one nice!nano

Hello! I am wondering if it would be possible to have a split keyboard, in my case a MicroDox, with a Nice!Nano on one half and an Elite-C on the other. The reasons I want to do this is to save money by only purchasing one Nice!Nano (and battery) and because I like the look of the trrs cable :).

Would I be able to flash both MCUs with ZMK or Bluemicro firmware, and then the Nice!nano supplies power to the other half? Or could I flash Bluetooth firmware to the nice!nano, and QMK to the Elite C?

Any help is greatly appreciated! Thank you. :)