Does not support secure SSH keys!
But iTerminal does not support anything except RSA SHA-1… yet the (completely free) app Termius does, as do other paid apps like Prompt 3, Shelly, etc.
I have emailed the developers to ask if they can provide support for RSA SHA2 and ED25519, but honestly… Termius is a nicer-looking app anyway, so I will likely just stick with that.