The way I understand it is that you dont need the extensions if you use brave (i dont have any of those installed and just use as strict shield settings as I can) but they will support them for as long as possible for those who also want to use the extensions. Brave seems to use a modified version of the chromium engine in their browser which includes the shields.

The only issues ive had so far are with youtube’s recent “3 strikes” message, which gets fixed by brave within a couple of days to make yt unable to detect that brave is using (or is itself) an ad blocker.

Brave Shields block ads and trackers by default, and they’re built natively in the Brave browser—no extensions required. Since Shields are patched directly onto the open-source Chromium codebase, they don’t rely on MV2 or MV3.

https://brave.com/blog/brave-shields-manifest-v3/

Commenting because fellow caps-esc swap enthusiast, and I would like to know the answer as well