Picture height getting cut off in mobile view

Hi

I'm very much a beginner at this! But am pleased with how my site is starting to look in the computer view, but when I switch to mobile view, lots of the pictures have been cut off.

What do I do about this? It's weird that the site builder tool doesn't just make it look good on computer and mobile view.

Thanks

Can you share your website URL?

Have you edited the mobile layout of your website?

Is this what you mean by the URL (sorry I am so clueless!)

https://opossum-dinosaur-zz4d.squarespace.com/config/

I did some editing to the mobile site to change the size of the logo a while back - I googled and found out how to do that by adding some code in, but I wasn't sure how to do it with the pictures and don't want to mess it up!

You website is private so I can't see it, can you add a site wide password?

No, I mean have you edited the mobile layout?
https://support.squarespace.com/hc/en-us/articles/6421525446541-Editing-your-site-with-Fluid-Engine?platform=v6&websiteId=5e972a6c760cdc02748a919e#toc-mobile-layout