We are testing on Big Sur, but we are not optimizing Sensei for Beta macOS. You can expect Sensei to work flawlessly in time for the official release of Big Sur, but the Beta experience will be just that, slightly unstable.
So far, the only major problem we've uncovered is that Battery information is not loading. If you are experiencing any other issues, I'd love to hear more about them. I'll sticky this topic for an ongoing discussion.