you may want to follow these steps:
Log in to your Fiverr account and click on your profile picture in the top right-hand corner.
Click on the "Selling" tab. Under the "Gigs" section,
click on the gig for which you want to add a portfolio item.
Scroll down to the "Live Portfolio" section and click on "Add Live Portfolio."
Upload your portfolio item, which can be a video, image,
or PDF file. Add a title and description for your portfolio item. Click on "Save."