Description:
We recently implemented Special:FunctionUsage in T390557, which shows the local and cross-wiki pages on which a Function is used.

To increase discoverability and surface this information where it is most relevant, we would like to add a link to the Function page linking to its corresponding usage page, for example, from Z801 to Special:FunctionUsage/Z801.

Some initial ideas:
We could show this as part of the additional menu

or more prominent directly on the function page.