Is this how most people type on mobile these days, drawing lines all over a keyboard instead of tapping the individual keys? I’ve never had an iPhone so I don’t even know if they can do this natively, but I know you can switch keyboards at least, so it should still be an option if not.
It does take a bit of getting used to. But typing on it feels awesome. since it uses just 5 keys, I have also implemented a version of it that works on my digital piano to type on my pc using midi (useful for loading sheet music on screen without having to get up.
Also, I use termux on android. I like the keyboard because it doesn’t take up half the screen by itself and also allows me to “easily” use function keys and modifiers.