missing-root The button is always at the same place the notification bar is, so you cannot press it instantly. I guess this is a bug? Had it on Pixel 4a (top middle) and Pixel 6a (there on the top left for some reason)
treequell Yes, it is a UI issue. A number of improvements to the UI of the Camera app including the one you raise here are documented on GitHub: https://github.com/GrapheneOS/Camera/issues/330 In the meantime, you'll have to wait for a second or two for the status bar to disappear after opening the camera app, and then you'll be able to open the options from tapping the v.
gosrox Please someone with github account add a comment to that camera improvement issue to fix the video page always looking like it is recording. The red circle is always half sized in the middle and does not go from full size to half as one would expect when tapping the button. A lot of times accidentally thought was recording when not. There is no visual change there, only a barely visible timer in with red background white text starts counting and easy to miss