Microsoft just did whatever they wanted with the web "platform", and so will Google.
In Microsoft's case what they wanted was nothing. They weren't a web business, saw it as a threat to their platform leverage, and so just left it abandoned and stagnant for years.
Google is simultaneously better and worse: they won't leave it stagnant because the web is their platform, but on the other hand they have a lot more to gain by abusing control of it.
Safari definitely does not just follow suit (see https://caniuse.com/?compare=chrome+102,safari+15.5&compareC... for example).
Call me when I can install Safari on linux (or any platform other than macOS/iOS).
Until then - the ugly truth is that Apple intentionally underfunds and underdevelops the browser because they see it as a fundamental risk to their control and revenue from the App store.
It's there because "they have to have a browser" not because they're doing anything novel or clever. And many of the things they refuse to implement aren't related to ads or Google's control at all - they're things that would have narrowed the gap between what a website can do on iOS, and what the App store apps could do.
Again - Apple is acting EXACTLY like microsoft here. Underinvesting in the browser because they see it as a fundamental risk to their best revenue stream - much like how MS ignored IE when the focus was all on local apps (the king of which was still MS office).
I disagree that Apple is underinvesting: their slower, more deliberate pace can be an advantage: you can see the pitfalls of implementations in other browsers. I am not disagreeing that Apple has had their own share of bugs, though.