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You can add the path in the filter.xml. <workspaceFilter version="1.0"><filter root="/conf*"/></workspaceFilter>

Try http://localhost:4502/bin/querybuilder.json?fulltext=insurance&orderby=@jcr:score&orderby.sort=desc in your browser.     Ref: https://github.com/paulrohrbeck/aem-links/blob/master/querybuilder_cheatsheet.md  

Refer : https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/use-of-infinity-json/m-p/185905 

You can use query to get the list of all the assets from your folder where dam:portalReplicationAction property is set .

If your organization is partner with Adobe then you can ask from your internal SPOC to have you the acess.

Are you modifying OOTB core component?If yes, then i will suggest you to extend it and then add the changes.

Refer : https://aws-quickstart.github.io/quickstart-aem-opencloud/