The template which creates the ticket text is <https://meta.wikimedia.org/wiki/Template:New_wiki_request>. It's in the source code when you search for "PHABRICATOR LINK+PREFILL". The link with the prefilled text appears if status = approved, e.g. here: https://meta.wikimedia.org/wiki/Requests_for_new_languages/Wiktionary_Konkani (in the very last line of the expanded template).