This isn't a plugin. The cookie blocking is just an extra filterlist that's built to be compatible with uBlock Origin and Brave Shields, and has been available

This isn't a plugin. The cookie blocking is just an extra filterlist that's built to be compatible with uBlock Origin and Brave Shields, and has been available for both for a while. The innovation is simply the browser proactively using a prompt to ask the user if they want to subscribe to the list.