For iOS I’ve been using iSH. It’s on GitHub (and the AppStore) and is an Alpine Linux shell for iOS. It provides no creature comforts for managing SSH connections, but does drop you into a pretty standard Linux shell. I believe it’s a stock Alpine install. iSH is an interesting project in and of itself, but in this context, you can also install a standard openssh client. This is usually as much support as I need on my phone or iPad to connect to a remote server.

https://github.com/ish-app/ish

I liked blink shell and panic prompt. In particular blink shell seemed very Linux-familiar. I switched back to a laptop a bit ago, though (iPad+ssh was a pandemic era fix that ended up surprisingly nice, but I can’t bring my desktop to do ssh over lan, if I want to go to a cafe or something).

I do miss the aspect ratio though.

I’m liking shelly, its putty underneath and you can buy it just once, unlike some other app that wants a $10/month subscription

LaTerminal is pretty cool, AFAIK the only iPad terminal that supports images (via either libsixel or the iTerm2 image protocol).

Shelly works quite well.

Secure Shellfish

a-shell is another good option