I have tried to recreate the process used by enwiki to mark Lua modules for deletion, in fawiki. Specifically, I have copied https://en.wikipedia.org/wiki/Module:Module_wikitext to https://fa.wikipedia.org/wiki/Module:Module_wikitext and I have used it to add a deletion template to a module page, as described here. This works on enwiki (see https://en.wikipedia.org/wiki/Module:Test_module as an example, where you will see the speedy deletion template is shown at the top of the module page). But it doesn't work on fawiki (see this as an example), nor does it work on test wiki (see https://test.wikipedia.org/wiki/Module:TestModule).
Why is the functionality inconsistent across WMF wikis? How can we get it to work on fawiki and testwiki ans others?