http://phecoopwm6x7azx26ctuqcp6673bbqkrqfeoiz2wwk36sady5tqbdpqd.onion/page-1808282259-Getting-WhatsApp-Rich-Snippet-Previews-Working-Misc.html
When setting up Opengraph metadata on a new site, snippets
might display correctly on Facebook's Opengraph debugger but
when you share a link on WhatsApp you don't get a link preview (or do and the image is missing). The metadata required is listed below, but 9 times out of 10 it's because I've not included itemprop="image" on the og:image declaration (something
which Facebook's OG debugger won't flag).