The same thing happened when I placed my s20+ down onto a hard surface, it looks as though the camera glass has been hit by a tiny bullet. With the genuine samsung LED case?!
You put it perfectly, this product is not fit for purpose! It is a real shame that this very innovative camera phone has this flaw.
I have since realised this phone is the only phone that you can buy a specialised camera guard for. Even when people use the camera guard hairline cracks are still appearing.
I hope samsung are able to help for to solve the problem that they have caused.
I am in Australia and had same issue exactly. Post it publicly on thier Facebook Page, then they will ask you to inbox them, so I did, If more us do this and raise it to Consumer Bodies and ACCC then we may get a resolution,
mine has also broken whilst being in my pocket, it looks like the the top left lens was too close to the glass on the inside and has shattered a perfect hole in the glass exactly around the lens. This has left a hole which dust and water can get in and cause further damage to the camera. I have a case on the phone and have never dropped or sat on it. Samsung need to sort these problems under warranty.