Board Thread:Support Requests - Getting Technical/@comment-3020860-20190416123959/@comment-34804319-20190416132948

The extension is not removed on Fandom, rather, it needs to be added/enabled by staff. The ExpandTemplates extension only became part of the core Mediawiki code in versions 1.23 and later. Fandom's version of Mediawiki forked at version 1.19.

Ask staff via Special:Contact to see if the extension can be enabled for your wiki.