PnP modern search: override default results with keyword results

I have a modern search box and results web part on a page. If I add a wildcard to the default search query, all results display as expected. However, when a search term is entered, the results aren’t filtered. On page load, I’d like to see all results from a default query (say, all docs in a library) and then filter those results based on a search term entered.

I’ve tried formatting the KQL default search syntax using a wildcard “*”, but the results don’t change when a search keyword is entered. Is there a KQL option to resolve this, or is it not possible?