Within English it’s because it became the default while keyboards were in use, and when we moved to computers basically everyone who would be using a keyboard was familiar QWERTY the convention stuck.
There’s some other standards, albeit with much more limited following. Proponents say they’re faster for typing, but a while back the GSA (IIRC) tried training typists on it vs QWERTY and didn’t see much/any advantage that would make a change worthwhile, so stuck with QWERTY as standard.
If you’d like to try some of these other ones (Eg [Dvorak](https://en.m.wikipedia.org/wiki/Dvorak_keyboard_layout)) you can configure your keyboard to match it and change your OS to recognize it.
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