MacRumors has published a story that Apple has released the fourth beta of macOS Ventura 13.4 to registered developers.
Apple Seeds Fourth Beta of macOS Ventura 13.4 to Developers
Apple today seeded the fourth beta of macOS Ventura 13.4 to developers for testing purposes, with the beta coming a week after the launch of the third beta.
Apple Seeds Fourth 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.