in Photos 'Open Photos for this Device' is unchecked, but Photos opens every time I connect my iphone anyway

Mac OS Catalina 10.15.7

with iPhone X running 14.4.2

I would like Photos to stop opening every time I connect my iPhone X

several posts online suggest that having the 'Open Photos for this Device' in Photos app is the way to achieve this

However, this appears not to function. Even though the checkbox is unchecked, the Photos app still opens every time I plug in my iPhone