Hi John,
Only by adding an other (old) Pro to the other location, and create it’s own zigbee mesh network.
(It’s not possible to bridge zigbee over LAN)
It’s devices can be integrated to the ‘main’ Homey Pro using the Homey Link app, this works locally but via internet as well.
The ‘feel’ is if it were devices paired with the main Homey, and can be used in flows etc.
Of course you can add for example a Hue or Ikea bridge to the other location instead, but then you can be limited to devices of their brands.
Note:
What you had in mind is possible with zigbee2mqtt. You can add an ethernet antenna and bridge zigbee signals that way.
Combined with Homey: This creates a separate zigbee network, and these devices can be added to Homey with the zigbee2mqtt community app;
But, you’ll need additional hardware (or if your NAS is able to run Docker instances).
I think it’s a matter of budget, and willing to add a new system next to Homey.
I must say zigbee2mqtt is from another planet compared to Homey zigbee. I can 100% recommend it.