Social share images and description for unique pages are not loading when sharing links in messages

It appears that no matter what we do when we share individual page links in iMessage, whatsapp, etc it always loads just the default image and just the page name. With our previous page builder it would also let us having an H2 under the page name with a CTA or other valuable information and have different images for different pages.
Here’s the site in question but it appears to be happening on all our sites.