Pretty decent article here
https://avoidthehack.com/best-pihole-blocklists
And there is https://filterlists.com/ which is a searchable index of lists. If you use uBlockOrigin you can add lists directly from fliterlists.com otherwise it provides links to Github etc.
I don’t use Brave, but I did read that post because I am interested in how they are handling this. It’s worth reading for that.