To be clear, I don’t know if it’s AI or not. Neither do I care in this context.

I am not the original poster.

About your trust in photos in your feed that they are real, you shouldn’t trust them.

Everything can be generated using AI. your best bet is to verify it yourself in crucial contexts.

The top reverse image search tools for me are Google and Yandex. If you can’t verify it yourself than assume the worst.