When you add images (jpg, png) to the email as attachments, they are displayed automatically under the message. Unfortunately, when there are many of them and they are also large, there is no way to see them without long scrolling through the images.
So: stop preview and treat images the same way as pdf’s and other attachments.
This request is different from the one in 2019 (!!). That asked for smaller preview’s. I ask for no preview at all.