If clicking on it does trigger a location permission prompt: what's the point? The "issues" with prompts getting denied can already be solved by web developers doing this themselves, rather than just blindly firing off a request on page load.
If clicking on it does not trigger a location permission prompt: have we forgotten about the Line Of Death [0]? Clicking random website-styled elements should never result in dangerous actions being taken - and leaking the user's physical location is definitely dangerous. Sure, they are trying to restrict the styling, but that's a fools' errant: somebody will just make a browser game where the button looks to refer to something ingame, but actually leak your real-world location.
Besides, who's actually asking for this? Location is perhaps useful for Google Maps-like websites to save you a few seconds of scrolling, but in practice it has mostly been spammy websites trying to get me to "subscribe to local news". Making geolocation easier is the last thing I want in my browser!
[0]: https://textslashplain.com/2017/01/14/the-line-of-death/