macOS 11 Big Sur is fantastic and is a big update.
The changes in Big Sur are as much under the hood as the UI, because of this Bartender needs additional work than usual to get it working great on the new macOS beta.
I already have it working reasonably well here, but still have a lot of work to get it working perfectly, but do not worry I will release a test build for all you using the macOS 11 Big Sur betas as soon as possible.