Image widget supports the ACF Image field and works the same as the default Elementor Image widget except it only shows ACF Image fields.
You find it easiest by searching for ACF Image in the Elementor Search Widget … field:
Drag the following widget icon into your section to add the widget.
After adding the widget to your section/column the following settings are shown.
The fields you can choose from are found in the dropdown next to the setting “Field”. It detects both fields on the current page and option page fields. Group fields are also support.