The latest public beta of Default Folder X 5.4 is available, and offers improvements on both Catalina and older versions of macOS. Specifically, it adds support for the version of Path Finder distributed via SetApp, gives AppleScript developers access to applets and droplets in DFX’s Recent Files menu, and fixes a bug in Default Folder X’s handling of tabbed Finder windows.
You can get a copy from the Default Folder X Beta Testing page.