Apple seeded the initial betas of iOS 16.5 and macOS Ventura 13.4 to the general public on Thursday. Developers were given access on Tuesday. Beta testing began almost immediately after the public release of the previous versions.
iPadOS 16.5 beta 1, watchOS 9.5 beta 1 and tvOS 16.5 beta 1 are also available to the public and to devs.