If you select the camera icon on the left, it (unsurprisingly) launches the camera app. The middle landscape icon opens your camera roll where you can upload images you've already taken.

Search Live is within Google Lens, to access it, just open Google Lens in the Google app, tap the Live icon, and ask away.

You can now upload images to ChatGPT-4 for it to analyze. Allowing you to ask questions about the diagram, photograph, graph or image.