Apple has released the sixth public beta of macOS 12 Monterey, and the first public betas of iOS 15.1 and iPadOS 15.1. They’re available on Apple’s Beta Software Program website.
Just remember that beta software is unfinished software, so proceed with care. Apple does public betas in order to increase the size of the pool of testers. The tech giant recommends keeping back-ups of your files before installing a public beta.
Apple has also released a new developer beta of macOS Monterey. Registered developers can download the beta via Apple’s developer portal. Or it can be downloaded over-the-air once the proper configuration profile has been installed from the Developer Center.