Apple has released updated for almost all its operating systems: macOS, iOS, iPadOS, and watchOS. tvOS apparently hasn’t been upgraded.
macOS Ventura 13.4.1 provides important security fixes and is, per Apple, recommended for all users. macOS Ventura 13.4.1 can be downloaded via the Software Update section of the System Settings.
iOS 16.5.1 and iPadOS 16.5.1 provide security updates. It also fixes an issue that prevents charging with theLightning to USB 3 Camera Adapter. iOS 16.5.1 and iPadOS 16.5.1 can be downloaded by going to Settings > General > Software Update on your iPhone or iPad.
watchOS 9.5.2 is a bug fix update. Apple Watch owners can download watchOS 9.5 by opening up the Apple Watch app on their iPhone and going to General > Software Update. To install the new software, the Apple Watch needs to have at least 50% battery, it needs to be placed on a charger, and it needs to be in range of the iPhone.