If all your org files are in your org agenda files variable you can use the org agenda to search.
I hit C-a to run org-agenda, they hit m to match tags, among other things, and type in :dired: . It will return a list of headings with the :dired: tag from all your specified agenda files.
If all your org files are in your org agenda files variable you can use the org agenda to search.
I hit C-a to run org-agenda, they hit m to match tags, among other things, and type in :dired: . It will return a list of headings with the :dired: tag from all your specified agenda files.