This change was noted in the Google for Android app version 16.0.7 and the latest iOS version, though it seems not to have been widely rolled out yet.
Under the old setup, the app displayed a split-screen interface with the top portion showing a translucent camera preview and the bottom showcasing recent images from the gallery. To use the camera, users had to tap the viewfinder before capturing an image for a web search.
The new update eliminates this extra step, allowing the camera to open instantly. Users can still access their gallery for image searches by tapping the gallery icon in the bottom right corner, though searching for gallery images now requires an additional step. This tweak aims to improve the user experience, particularly in situations where quick access to the camera is needed, such as capturing a fleeting image.