Good news! Brave for Android now let's u use your favorite uBlock Origin Blocklists!
Under Settings > Brave Shields & privacy
Can you now add custom filterlists and edit Brave's default selection of the already avaible filterlists. Some of you now that this was possible before too (via brave://adblock) but at this time it had no UI and wasn't a official feature, now you can easily add, remove and customize fiterlists via the the settings.
Blocking variations.brave.com which is used for A/B testing could potentially break Brave's functionalities. For me did Brave's "forgetful browsing" feature broke which seems to be disabled by default if you block this domain.