I've been working on this for a couple weeks now, if you've not seen it then it lets you search/filter communities and instances on all Lemmy instances.
Currently over 1k instances and 26k communities! We're growing hella fast!
All the apps support for searching for new to the instance communities from new instances are all out of sorts especially since there are multiple formats to linking them.
It's not great on mobile, unfortunately. I made a fix so at least you should be able to see the community name/link.
I have to refactor the list a bit as it was rushed in, and there will be improvements soon...