HA and VPN (to join home and office)

Configuration
1

I’ve HA installed on a Raspberry at Office and my office is connected by VPN to my home (using two fritzbox!). Is there a way to let HA see all my “home” devices? …and share them with the HA in Office? Thanks.
Riccardo.

2

You could try this: GitHub - custom-components/remote_homeassistant: Links multiple home-assistant instances together

If the VPN connection stays reliably you could probably have one instance of HA control everything also.