I have been designing book covers for a few months. All clients are happy. My gig went from page one to page 15 for some reason. I called the help center to tell me the "reason," and they acted like they had no idea. I invested in Fiverr; I had clients I asked to join and order there. I felt very insecure for the first time. Although I can give professional service, I am unsure about continuing on a platform that does not work on transparency.
My best advice:
Invest in other freelance platforms - 99designs, Upwork, etc.
invest in making your own website and taking orders from there. use Fiverr seller plus to extract targeted keywords for your website.
sells premade covers on e-commerce platforms.