The PetaPixel article has a sample, though the original photo from this article is lost.

https://petapixel.com/how-steve-sasson-invented-the-digital-...

https://petapixel.com/assets/uploads/2022/09/Prorotype-Digit...

I wonder if any exist on the internet and if the camera is still functional.

Edit: it's very likely that no photos exist because the tapes were being reused and there are many reasons why the camera has been nonfunctional for a long time now.