how do you define how open graph images show on ios message app?

I’m posting here the answer to my own question in case this could help others out.

The order in which you put the meta tags has it’s importance for iOS. If the sharing tool of iOS first finds the meta og:image it will use that for the thumbnail, if it first finds twitter:image it will use that instead.

So the correct order for me to have the mosaic show up was to add my og:image tags first and then add the Twitter ones.