Hello,

In general, all options that are in the “Section” are related to the Elementor builder, so our theme cannot influent on CSS of the Background-size property.

Here is an explanation of the cover value:

cover
Scales the image (while preserving its ratio) to the smallest possible size to fill the container (that is: both its height and width completely cover the container), leaving no empty space. If the proportions of the background differ from the element, the image is cropped either vertically or horizontally.
https://developer.mozilla.org/en-US/docs/Web/CSS/background-size

Thus, if the picture is zoomed-in, it is normal and the right work for the cover option because such works CSS.

https://monosnap.com/file/Lui1rTKEN9AJw2Sp2kNcTVGzdIch90

Kind Regards