We successfully tested a number of iOS SSH clients. They should all work.
Can you file a bug with details of what you saw? Either https://github.com/tailscale/tailscale/issues/new or email support@ ... whichever you're more comfortable with.
ah I think I figured it out!
I had a notification asking me to verify, but because of Focus, that notification didn't show up anywhere that I could see...... So in theory, this should work, will try again.
Works fine now
I've tried this earlier and was unsusccessful sshing from my iPad, using Termius and Blink apps. Not sure if there are specific client requirements on the iPad?