There are 2 feature I think would help most of the users out there.
Private Bookmark Folders
If there was a way we could create a private bookmark folder which would only show up in private window then it would save some space in normal window bookmark ribbon.
Open Specific Websites in Private Window Automatically
A feature that allows us to automatically open some specific websites such as banking and others in private mode.
I know there are extensions out there that can do both but rather than extensions which may not be safe + extension not being supported for android brave browser I would like to have this features inbuilt in brave browser so that I can have this feature in both windows and android.