Board Thread:Support Requests - Getting Technical/@comment-38118372-20200109190037/@comment-1038387-20200109191141

Yes and no.

A template can be created on Community Central and it can be used with on other wikis. This only works for templates hosted on central and should ONLY be used for boilerplate user page templates without parameters. Interwiki template calls are very expensive. So you can't do what you want. It's a small template, you should just create it on every wiki.