Looks cool! Designing my own printer has been on my practically infinite list of projects for a long time, so it’s nice to see you do yours.
I recently stumbled upon a video series you might enjoy about designing 3d printed parts creatively and with the full possibilities of 3d printed geometries in mind. Careful, it has rabbithole potential!
I’d say no you can’t do that. It is missing a neutral connector entirely and there is no way it could preserve all functionality if it were possible to configure another port as the neutral phase connector. And as a tiny size is the most important aspect of it’s design, I wouldn’t expect there to be an internal circuit that would allow a reconfiguration like that, even if the number of connectors were not the limit.
If you want to use one with a neutral connection, choose the appropriate product.
If you want to use Zigbee or Zwave you simply need a USB dongle for that. Search for “Sonoff Zigbee Stick” if you want to see what that looks like. As you are already running Armbian it should be easy to install HomeAssistant with ZHA or zigbee2mqtt on it.
The algorithm has put us in a group of similar interests I guess, haha! Your design looks very neat (and strong too)!