All done :)
403 preening themed images were uploaded since 2021-03-29T00:00:00Z, and all the badges for the uploaders and artists of those images have been awarded (except for the handful of artist badges where I have PMs out asking if the uploader is actually the artist).
If you believe you should have gotten a badge, either the PreenHub for participating in the event (including uploading an image), or the Verified Pegasus for creating art for the event, please let me know.