I haven't seen anything yet on whether Brave will support it, though if I'm understanding correctly, they won't have a choice since they're using Chromium. Hopefully I'm misinformed.
It feels weird that I'm now grateful for how crap they are.
Because their customers aren't security nerds that have smartphones with authentication apps.
They want people that barely get smartphones, or still use feature phones, to be able to access their services with some improved security workflows.