I don't care what kind of code is required for it to actually work. If I can't start a call in a browser other than Brave, then it by definition does _not_ work in every browser. You stating that it requires native code that's not present in other browsers is clear evidence that it doesn't work in all browsers.

No one disputed that but I gave reasons why this is so. You can use Gmeet in any modern browser (it breaks more often in non-Chrome browsers IME). Is it better on that basis alone? I think not because TANSTAAFL. Why is Google subsidizing it that way?