You can use multi-cluster search across as many views on as many clusters as you want. However, there are restrictions around which connections you can create within a given multi-cluster view:

To connect to multiple local views, say A, B, and C, you can create a single non-multi-cluster local view, say D, that searches across those three views. See Creating a Repository or View for more information on creating standard views.

Once the local view has been created, you can connect the multi-cluster view to D as its single local and that will effectively search across A, B, and C.

To connect to views on a remote cluster you will need to create connections to each remote repository for each view.

It is permitted for the remote view itself to be multi-cluster.