SharePoint Hightlighted content WebPart Custom query

In a SharePoint Hightlighted content WebPart it's possible to add custom queries to filter documents and elements. I can use custom queries for user properties or others, but for URL parameters like {QueryString.<ParameterName>} it doesn't work.

My target:

I would like to show documents in a Highlighted content webpart based on url parameter.

My custom query in the highlighted content webpart looks like:  

(Path:"https://<tenant>.sharepoint.com/sites/<Site>/FreigegebeneDokumente/") AND
{|{RefinableString07}:{QueryString.Prozess}}

My URL looks like this: 

https://<tenant>.sharepoint.com/sites/<site>/SitePages/ProzessseiteURLFilter.aspx?Prozess=B  Personal

Thanks for inputs.