Using Highlighted Content to retrieve all docs with a managed property value

Question

I want to configure the highlighted content web part on a hub site to bring back all documents that have a managed property column set a certain value.

I can configure a filter or CAML if I point to single library but what if I need to incorporate all document libraries in the hub site family

Here, I set up my managed property

next I configure my HCWP

Nest I weep as nothing is retrieved :-( . I wonder if this restriction in HCWPs .. Is there a way of seeing the final query?

Answer 1

In the quert text(KQL), there seems to be a problem with the symbol "=". Try to use ":" instead of "=". Check if it works.

For example:

contentclass:STS_ListItem_DocumentLibrary