Add Pinterest images without replacing the main OG image
Pinterest often benefits from portrait images, but most other preview surfaces expect a wide image.
Keep the wide Open Graph image first so standard link cards stay stable across social and chat apps.
Add the portrait image in structured data when Pinterest is important. A 2:3 image gives Rich Pins more usable vertical space.
Check that both images are crawlable, under practical file-size limits and served with a correct image content type.