Show Dashboard from another HA server

I have 2 HA servers running - one in my main house and one in my vacation house.
Can I show a dashboard from my vacation house inside the HA UI for my main house in an easy way?
Here are the solutions I considered:

  1. I can show the remote HA Dashboard as a web-link inside my main Dashboard. But then it will show the sidebar and top bar from both the remote and the main HA
  2. I can remove the remote sidebar and top bar from the remote HA Dashboard using wallpanel. This probably works, but requires a duplicate of the dashboard on the remote HA (one for showing the dashboard locally and another for showing the dashboard without the panels in the main HA) - and that requires me to maintain 2 versions of the same Dashboard…to much work…
  3. I can use the “Home Assistant Remote” integration and integrate the 2 instances, and then rebuild the remote dashboards on my main server. Again so much work and requires that I maintain the same dashboard both on the remote and the main instance.

All I want is a simple solution to show a Dashboard from a remote HA instance inside my main HA instance. Am I the only person with this use case?

You could connect instances using eventstream and add entities into HA UI