The screen shows half white and half black
Welcome to the community. Interesting display. I use Brave on a desktop and don’t know anything about Android devices, so really can’t help.
On a desktop you can go to
brave://settings/appearance and change
Brave colors. I think there is a similar setting on Android. You might want to try toggling through the various options and see if that solves the problem.
If it doesn’t, hopefully another community member with knowledge of Android can pop in and help.