Apple has made available the third public betas of iOS 13.1 an iPadOS 13.1. Which, as I’ve noted before, is unusual since iOS 13 and iPadOS 13 don’t arrive until Sept. 19,
The public betas are available on Apple's Beta Software Program website. Just remember that beta 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.