At the moment, we offer editors for content creation of PDFs, and you can add images directly from the media library using HTML tags on this section - https://prnt.sc/JJ0b4oVshUXd. Simply include an image tag with the source URL of the image from the media library to add an image to your PDF.
However, currently, we do not have the capability to display uploaded images from the Contact Form 7 File Control.