9to5Mac published a story that Apple has released the tenth beta of macOS Big Sur to registered developers.

Apple releases macOS 11 Big Sur beta 10 to developers

The beta testing process of macOS 11 Big Sur continues today, with Apple releasing the tenth beta of the operating system to developers. This comes as we inch closer towards a final public release of Big Sur, perhaps as early as next month. 

Apple releases macOS 11 Big Sur beta 10 to developers - 9to5Mac