MacRumors published a story that Apple has released the second beta of macOS Ventura 13.4 to registered developers.
Apple Seeds Second Beta of macOS Ventura 13.4 to Developers
Apple today seeded the second beta of macOS Ventura 13.4 to developers for testing purposes, with the beta coming two weeks after the launch of the first beta.
Apple Seeds Second Beta of macOS Ventura 13.4 to Developers
Registered developers can download the beta through the Apple Developer Center and after the appropriate profile is installed, with the betas available through the Software Update mechanism in System Settings.