l have the same issue, cross cluster seach is working in dev tools, but I cannot create an index pattern.
I am also using the last opendistro elasticsearch/kibana docker image.
I am also using admin as user
If there’s anyone who made it works and explain every steps, it would be helpful.
Actually an issue has been raised, you can see at the bottom of the discussion, a way to reproduce the issue.
Thanks for checking. Just trying it on test clusters, cross-cluster-search index pattern on kibana just worked out of the box. Can you give it a try now?
If your latest try fails, can you share your latest setup info (OpenSearch version, screenshot of index pattern setup page, observed etc) so we can investigate this further if this is still an issue?