@ton Good question... As a local user I can see them on the #Mastodon explore page.
https://respublicae.eu/web/explore/tags

Are non-local or non-logged-in users only able to see the top 3 trending hashtags?

I'm also hoping that something will start showing up here at some point but I'm not sure what the requirements are:
https://respublicae.eu/explore