Board Thread:General Discussion/@comment-46091064-20200918024225/@comment-39340968-20200918024600

Badges: You could be referring to Achievements. Those are requested through Special:Contact

Custom tags: The best solution would be to use UserTags or wait for staff to whitelist the custom user tag system messages on UCP (which might not be for a while).

Edit: Oops, I didn’t realize that UserTags hasn’t been updated for UCP.