The best way to interact with wikipedia is just to be bold and edit in the changes you want to see. Wikipedia policy says that we should not try to make editorial decisions off-wikipedia, they should be done by editing directly, or on the talk pages of Wikipedia.
To be bold is one of the oldest ideas on Wikipedia: do the edit you want to see. However, if you are directly affliated with Typst - you created it, or you work for it, then you should not edit. Then it’s better to make the edit proposal heard on the talk page and make sure the editing happens through an intermediary editor.
About sources, we need to prefer reliable sources. This is an encyclopedia, so sources should preferably be independent (not written by the Typst company) and secondary (not describe the author’s own discoveries about Typst).
Take that in, because it might be a bit contrary to expectations. The best source is not to link to ‘Typst Universe’ and say “see it exists” but to link to a published magazine that describes Typst Universe.
I’m not a very active wikipedia editor, but I’ve been a wikipedia editor for a long time, so just trying to help.