BitTorrent v2 supported Torrent Clients
What is BitTorrent v2 ?? In short, it is an advanced and new version of the standard BitTorrent (torrent) protocol. If you want to learn more and are ready to blow your mind, check out this article: https://blog.libtorrent.org/2020/09/bittorrent-v2/
BitSwarm Client GUI is a cross-platform application with BitTorrent v2 support.
BitComet is a BitTorrent v2 supported cross-platform included Android but no Linux version. It is the only non-open source application among these applications. Also i strongly DON'T RECOMMEND downloading this application. Because these: "Warning A lot of users on Reddit reported that BitComet tried to install multiple viruses and adware during the setup" and "Bundleware The installer prompts you to change your default search provider and install a media player. After installation it opens a webpage with an ad for another software install."
The list will be updated as more apps add BitTorrent v2 support. If there are other apps that you know support BitTorrent v2, let me know in the Comments.