MacRumors published a story that Apple has released the second beta of macOS Sonoma 14.5 to registered developers.
Apple Seeds Second Beta of macOS Sonoma 14.5 to Developers
Apple today seeded the second beta of an upcoming macOS Sonoma 14.5 update to developers, with the software coming two weeks after Apple released the first beta.
Registered developers can opt-in to the beta through the Software Update section of the System Settings app. Note that an Apple ID associated with an Apple Developer account is required to get the beta.