Sometimes buyers request shows after you refresh the page, you can refresh it. Moreover, join Facebook groups regarding your services e.g. if you are offering "web development services" you can join groups named as "Web development projects" or "Web development freelancers" (These are just some dummy names to make you understand.
In these groups, people often post about their requirements of web developing projects. You can contact them and bring them to you Fiverr gig to make them buy your gigs.
You can check THIS video from "Online Freelancing Essentials: Be a Successful Fiverr Seller" course which is a free course by Fiverr and it is very helpful for beginners as well as experienced sellers on Fiverr.
Fiverr is more congested these days then it was a few years ago as corona affected the markets and more people are finding jobs and projects on Fiverr. It gets tricky to find clients so the best practice is to try bringing as many clients from Social media to you FIverr gig as possible.