I worked on Fiverr 2 months now, number of customer feedback very much, I have achieved Level 2, but customers can not upload pictures job after I finish them every time they are evaluated. Therefore, other customers can not know what I was doing.
If you mean work samples are not showing up then the clients have control over them.
They can disable the display of their files while completing order.
Also only images and pdf files are visible if they allow.
Maybe your Gig portfolio is off. You may need to check and make sure it’s on.