There are tons of foreign language fonts installed by macOS. Starting with Catalina, there is no way the manually remove them anymore. However, Apple made it so they don't show up in the font menus of typical Mac apps. One exception is Affinity apps. For example, see how many of this one font is clogging up my font menu:
I found this 2017 thread here and it ends with "We have now resolved the problem and will make the fix available in the next iPad & Mac release." Maybe this is a regression?
I originally posted in this thread, but the problem is also in the betas so I hope it's okay that I reposted here to hopefully get more attention.