Simple terminal applications like ping or curl or yt-dlp. I also like using python -m http.server to access my files over the local internet. w3m sometimes works when my mobile data is very slow and can’t load web pages. I also do use ssh a lot. I don’t need it if I have an ssh app but it is nice to have, and I switched to android for it.

I use it locally.

Personally, I like using the terminal on my phone, and the only terminal I found for iOS is extremely slow because its emulating linux.