Feature Image Cropping on Blog Post

Hi there,

First off all thank you for the amazing theme. Currently working on a site-in-progress.

For Single Blog Post,
I was wondering if it is possible to not have the feature image be cropped but instead, feature the entire image as provided. As I noticed that currently right now it seems to be cropping based on a specific ratio which is really narrow.

Have tried using css (object-fit:cover/contain etc.), but does not seem to be working.

Any assistance or advise is welcome on this. Thanks in advance.
Hope to hear from you soon, thanks!

The page I need help with: [log in to see the link]