At this point, why doesn't the browser implement the cookie popup so every site doesn't have to re-invent it? Just don't allow access to cookies programmaticall

At this point, why doesn't the browser implement the cookie popup so every site doesn't have to re-invent it? Just don't allow access to cookies programmatically until the user has allowed it via the browser's built-in popup. This already happens for things like notifications and location access, is this something being worked on for the future?