Hmm. Part of the reason why I asked is some people were getting update errors from where their OS was putting the components folders into admin area only and then couldn’t access them, which stopped Shields from working. But if it’s fetching the updates with no issues, then it seems the issue lies elsewhere.
I do see in the screenshot that you have other extensions. It could be related to that. Or it might be some cookie that needs cleared.
For now, let me ask, if you open in a private window do you see ads as well?
Small Note:
I would Block Fingerprinting
And if you don’t have content filters enabled, you may want to go to brave://settings/shields/filters and enable Fanboy's Annoyances + uBO Annoyances
at least. Maybe scroll down and do Brave Experimental Adblock Rules as well, but that one is more iffy. Just to show you what I’m running: