Board Thread:Support Requests - Community Management/@comment-123347-20190510125430/@comment-168424-20190515034556

Almost certainly, it is a lie that FANDOM staff can't add the tag. Software doesn't work that way. It's not like they chisel IDs into stone tablets. Most likely, it's just that they don't want to let those with the ability to change it do it based on some arcane policy.

Fortunately, you can add it by other means... maybe someday even that won't be possible, since the future direction looks like much less customization, not more. C'est la vie.