Google announced that the lock will be replaced by a new “tune” icon with the release of Chrome 117 in September to help users better understand what its actual purpose is.

New Google Phone, Messages, and Contacts app icons roll out [U] Like Gmail, Messages is one of the few Google apps to feature an animated splash screen for its icon on the web .

You can still add it as an icon. After going to the website via Safari, tap the Share menu button. In the menu, scroll down and select Add to Home Screen.