Fixing double scrollbars on embedded content

I have a gallery page on my website that only has an embedded code from another website on it. The page has double scroll bars as it is not synced to the content. Expanding the height of the Iframe fixes the problem until you select the load more button producing more content.

Is there any way to sync the content so only one scroll bar appears?

This is particularly a problem on mobile devices. Forgive me, I have zero coding experience and do not know a lot of the terminology. Thanks is advance.

Did you ever figure this out? I’m dealing with the issue currently