welcome to Manjaro forum @wknapik
Previous topic has-the-brave-browser-been-removed-from-manjaro-repositories was closed July 2021
brave-browser 1.56.14-1 and brave-browser-beta 1.57.2-1 are currently available from Manjaro extra repository - https://packages.manjaro.org/?query=brave
New forum users do not have permission to post active links to prevent spam. Inactive links can be posted by using preformatted text e.g. https://brave-browser-downloads.s3.brave.com/