Apple's third developer beta of iOS 18 and iPadOS 18 introduces dark mode icons for third-party apps, a new Select button in Photos, dynamic wallpapers, a new password manager, app lock/hide features, improved RCS support, and more.
https://alternativeto.net/news/2024/7/apple-unveils-ios-18-beta-3-with-dark-mode-icons-enhanced-photos-app-and-improved-rcs/