https://wccftech.com/macos-big-sur-11-0-1-developer-beta-is-available/

Apple has released macOS Big Sur 11.0.1 developer beta, even before the final release of macOS Big Sur 11 was made available to customers. The update includes some new wallpapers and performance improvements.

If you already have a macOS Big Sur beta installed, you will be notified of the new update. It is around 3.69 GB in download size for a 2019 13-inch MacBook Pro. In our testing, we have found that it performs better than macOS Big Sur 11 beta 10. The company must have been working on bug fixes and performance improvements which are part of this new build, while the previous build must have been finalized to be released with the upcoming Apple Silicon MacBooks, expected to release in a few weeks.