Publicly sharing a stolen image in a social media post that consists almost entirely of the stolen image is unlawful in most legal jurisdictions.
Adding credit to the originator doesn’t make it lawful without first getting permission to publish, and many such “credits” just name (often by a meaningless pseudonym or platform name) the immediately previous thief who unlawfully published the image.
All of this is a win for platform owners like Mark Zuckerberg and a loss for the universe of people still purporting to know right from wrong. Zuckerberg is guilty of countless violations of ethical common sense and doesn’t live in that universe. And his sucking up to and funding Mango Mussolini is another indication of a problem that needs fixing and is a reason I left his platform recently.