Hi Maybellyne,
The problem is: I’ve not uploaded any image to those pages. The image you can see on those pages are dynamically displaying the Featured Image. I’ve checked all the Yoast SEO settings, there is no image selected to show when a URL is shared on Facebook.
I’ve got no clue where Facebook is sourcing this image from, it’s also not in my Theme settings (Thrive Theme Builder).
So sadly, no, I can’t trace where the images is coming from. It’s weird that it’s not just selecting the Featured images as primary image.