I have the same issue on a Pixel 7. The activity field on the edit page is neither an input field nor a drop down. The only thing the pixel will do is highlight the incorrect activity ask if I want to copy. This is only one of the the updated features that is either nonfunctioning or has minimized the actual information content of the app. The activity heart rate graph, which had already lost a degree of usefulness with the last update, has with this update been made smaller and less easy to use.
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