Thank you for having a look. The problem is actually when I analyze an individual post. It shows under the “article” section that the logo is missing.
Sorry for not specifying earlier. Looking forward to your response!
Aha, so Yoast is adding JSON+LD, and setting your post as an “Article”. An “Article” requires a publisher, and a publisher requires a publisher logo. Perhaps Yoast has an option in their settings for the publisher logo?