I added the PnP Modern Search web part from this link @ https://github.com/microsoft-search/pnp-modern-search/releases . and inside the "PnP - Search Filters" i defined 2 managed properties (AuthorOWS + CreatedBY), as follow:-
and i were able to filter my "PnP search Result" web part based on these 2 fields, as follow:-
Now i thought that this will not work, as inside our SharePoint Admin Center >> Search Schema >> Managed Properties >> both managed properties (AuthorOWS + CreatedBY) have their Refinable property as No, as follow:-
So my question is, how i were able to filter using 2 managed properties which are not Refinable?