Board Thread:Support Requests - Getting Technical/@comment-33230496-20201016200325/@comment-9605025-20201018004618

You could use #ifexist; but not like that. However, I don't think other wikis would like that very much. What it would do is add the template page to a wanted pages list of every wiki you use your signature on. Unless the wiki has the template in which case it would use the template.