Gemini ecosystem is quite active. There other smaller protocols as well, all part of the "small web" or "small internet" movement. I wrote a bit about Gemini recently[2]. If you're curious about it, you might want to give it a read.
I've implemented some of them in my little toy browser Fafi[1].
If you want a browser with more features and more polish you can check Lagrange[3], it also supports Gopher and Finger besides Gemini.
Gemini seems to be the land of broken clients. I tried amfora recently, and it gave a fatal error. I futzed around with other clients in the past, and they all seemed to have problems of their own.
https://gemini.circumlunar.space/docs/faq.gmi