Both sites needed me to sign up to see posts, so I can’t see any example that you wanted to show. Do you have other examples that don’t require a sign-in?

And you know, given that were talking about common use of the symbol, it’s better to give examples that is not constrained to niche groups that would use the symbol even without widespread acceptance.

Such examples don’t really prove your point that those languages still uses th in the modern world, just like the few people on Lemmy using it doesn’t prove it is still in use in the modern English language.