Hi @Anton2
You can get the Dashboard-definition with the databricks cli. You need the id of the published Dashboard, which you see in the url, as example:

Then, open a Terminal, run databricks cli, and save the output in a json file:
databricks lakeview get 01efdce4fd64105f9030f5b203c77cf9 > dashboard.json
you can see the content in an editor:

Also with the databricks cli, you can create new dashboards. I didn't had the time to test it, but you should be able to make it work.
databricks lakeview create -h

You may have to change the json-file, that only the request body is in there.
I'm looking forward to your answer as to whether it worked