I was mucking about on my Mac the other day playing with the accessibility settings and came across this: https://support.apple.com/en-gb/guide/mac-help/mchlb2d4782b/... - s system that lets you move the mouse with movements of your head as picked up by the web cam. Woks very. Scrunch nose to click etc.
It's designed to make a computer secure against even physical access to the hardware. Because ChromeOS systems are often used as work or school machines, and need to be 100% completely owned by the institution and immune to the actual user.
I mean, to be fair, Google grew up just trying to get us to click on things. Apple had to convince people to part with sums of money for lumps of metal and plastic with lightning in them.
Apple probably had a bigger budget for that sort of thing from the beginning, thus creating a proper culture. Google, probably not so much.
Apple has been doing this for decades with heavy investment into assistive technology, far better than other platforms.