If it is featured image then you have to change its size to make it full width by using the custom plugin solution shared in the following topic.
https://colorlibsupport.com/t/how-can-i-stop-resizing-featured-images/
If it is featured image then you have to change its size to make it full width by using the custom plugin solution shared in the following topic.
https://colorlibsupport.com/t/how-can-i-stop-resizing-featured-images/