Brave blocks those ads anyway so no point in Ublock, maybe that's why it's left out. It does inject it's own ads though, and then there's all the crypto nonsense.

Ads on Brave are opt-in (and not embedded on webpages anyway) and the "crypto nonsense" is a way for them to try to stay afloat without having to accept money from Google and the likes.

Brave adblocking breaks some websites that uBlock Origin doesn't.