Hello, @IP,
Let me try to explain it to you.
Our monitors work on pixels resolution, and Elementor is based on bootstrap, so when the image size is small then on a 17″ screen, it shows fine, and on a 27″ screen it does not show as full width, because of the container size. The container does not shrink itself on larger screen sizes, and when you use the larger resolution image it fits itself on smaller and larger screen resolutions as well.
So you have to check the element setting in which you are adding/using that image, there might be some setting in that element to enlarge the image on larger screens as well, Otherwise, you have to try with the Custom CSS code.
Regards 8Themes Team.