Received this email today. As a Beta member on one of my ATV4K units, I advise people not to do so unless having a quirky device doesn't bother them.
Try the new iOS, iPadOS, macOS, and tvOS public betas
The iOS 13, iPadOS, macOS Catalina, and tvOS 13 public betas are now available. As a member of the Apple Beta Software Program, you can help shape Apple software by test-driving pre-release versions and letting us know what you think.
Go to the Apple Beta Software Program
Try the new iOS, iPadOS, macOS, and tvOS public betas
The iOS 13, iPadOS, macOS Catalina, and tvOS 13 public betas are now available. As a member of the Apple Beta Software Program, you can help shape Apple software by test-driving pre-release versions and letting us know what you think.
Go to the Apple Beta Software Program