Imported posts from Square Space are linking images intead of importing

Hi there. I just realized a new problem with my import of 4000+ articles from Square Space to WordPress using this tutorial. https://www.wpbeginner.com/wp-tutorials/how-to-properly-move-from-squarespace-to-wordpress/#comment-1902980

Images in the body of the post are linked to Square Space even though I used the “Auto Upload Image” plugin. Only the featured images it looks like were imported to WordPress. Is there a way to fix this? I have already fully developed this website and added another 100 posts since.

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