Indexing Websites on Brave Search
Brave uses the Web Discovery Project to handle website indexing. You can read more about it at https://support.brave.com/hc/en-us/articles/4409406835469-What-is-the-Web-Discovery-Project
Essentially, there are no webmaster tools or ways to directly submit your website to Brave. Instead, websites are discovered and indexed based on Brave users who have opted into contributing to the Web Discovery Project. Once a site reaches an undisclosed number of views from different users, it gets submitted to the Search QA team for validation and to filter out potentially harmful links.