There should be a couple of ways to uninstall it.
On my phone, it’s possible to go to either a home screen icon or the app menu icon and push on it. Hold it down long enough, and a menu pops up. One of the options is uninstall program.
Another option is to go into your settings menu and under Applications. You should be able to find Brave there. Click on it and when the screen opens up for Brave, you should be able to uninstall the app there.