Also autofocus on page load is a terrible idea on iOS as it automatically brings up the keyboard.
No one wants to switch between web pages and suddenly have to wait for the keyboard to appear each time on page load.
That's a fair statement. Conversely, why should we put up with Apple stifling the web platform? Especially when there's strong evidence to show this is motivated primarily by profit rather than the user experience [1][2].
[1] https://open-web-advocacy.org/walled-gardens-report/ [2] https://changelog.com/jsparty/316#t=00:25:59.26
Expectation on iOS is that anything that is focused you should be able to type into.