Fiverr is a network of freelance people, stay-at-home moms (is this term still allowed in this day and age? probably not) and other people who have a specific skill or ability and some free time. You can find a lot of different services on the fiverr network. I myself have used it in the past to get myself a nice logo, business cards or just some random guy wishing a friend happy birthday in a short video.
Fiverr is really a part of the gig economy, and it is no surprise that they offer a lot of NFT services. With the booming NFT market the last year the Fiverr section of NFT has also increased in people wanting to earn some money with creating them.