Thanks for this tip. Once I got the search field name correct (layer_uuid_rule_uuid:) I was able to find logs from some rules that I would expect but not others. I also found that in at least one case, I had to remove the underscore _ to get results. In the Logging and Monitoring guide, it says:
For faster results, use this syntax in the query search bar:
layer_uuid_rule_uuid:*_<UID>
For example, paste this into the query search bar and click Enter:
layer_uuid_rule_uuid:*_46f0ee3b-026d-45b0-b7f0-5d71f6d8eb10
However, in at least one search, I didn't get results with the _ included. When I removed it and searched on *<UID> I got results.
Seems in general searching via Rule UID is at best unreliable.
Dave