Browser alerts are nonexistent. I only see ads

Super basic question - I have two PCs and in all my experience with Brave, I’ve never seen a notification from any website ever. On both PCs, I’m using default settings. Nobody on the internet has anything to say about this. I’ve never had a problem with Chrome notifications which is basically identical as far as I can tell. I’ve enabled notifications for many sites if I look in brave://settings/content/notifications, so I have to figure what I’m experiencing is not the standard behavior. I have the latest version V1.21.77 (Mar 15, 2021)