To be honest, I'm just somehow incompatible with touchscreen text input regardless of the screen size. It works 90% of the time, sure, but the remaining 10% I want to yeet the damn thing at a wall for repeatedly failing to read my mind. This is especially exacerbated when I'm typing in Russian — which I do much more than in English — where each word can have one of something like 30 different suffixes depending on the context it's used in. Computers are quite good at applying formal rules to input data, yet somehow, no touchscreen keyboard does this. You added a word to the dictionary? Too bad, that's the one form that won't be autocorrected, now add all the remaining ones.
No one seems to question whether a qwerty keyboard is a good fit for this. Everyone somehow accepts that as the only way. But in reality, it doesn't pass even the slightest scrutiny. It's qwerty because that's the layout most people are familiar with from computer keyboards. It's not optimized to take advantage of the touchscreen hardware. Instead, it's a layout that works beautifully for full hands, crammed into a screen where you have use it with just two thumbs that often miss the tiny keys.
I tried to rethink touchscreen text input once[1] but this prototype ended up having such a steep learning curve that even I myself switched back to qwerty. I might try it again sometime in the future but I'm also open to ideas.
[1] https://twitter.com/grishka11/status/1517431598857302019