You don't need to know graphic designing to provide background removal services on Fiverr. Actually you don't need any skill or experience. There are so many free online tools that you can use to remove any background from any image. All you have to do is upload your images to a tool. It will automatically remove background for you.
Like in background removal gig, You don't need any expertise to provide a SEO report. There are hundreds of free websites which provides free SEO reports for any website. You can simply copy paste your customer's website URL to one of these websites and automatically generate SEO reports. Checkout the link at the end for websites which provides similar SEO reports free.
There are so many free online tools that you can use to design video flyers, gif flyers, ad banners, IG Story ads and so much more. Best part is that you don't need any skill to use these. They have premade templates that you can edit with your own details and images. So you can provide this service as a Fiverr gigs without skills
This is one of the best Fiverr gigs For beginners. Because you don't need any skill to provide this service. All you have to do is go to a website and read their article and post a comment. Or visit a YouTube video and comment after watching it. It's simple as that. This is the easiest Fiverr gigs because this category has a very low competition on Fiverr.
Find cheap low cost Fiverr gigs and you can list them on another Freelancing platform like Freelancer or Upwork with a better price. When someone buy your gig, you can order the same gig on Fiverr. Once the seller deliver you the product. You can deliver to your buyer. It is kinda like dropshipping for Freelancing.