It's because the team did not list it there.
Fatbtc is a joke and I would not send any of my funds there ever.
I also would like to recommend this stay away from that exchange my withdrawal request got processed after 48 hours that is really slow. I hope in future this token will be listed on good exchange than it will make the process of so fast. Let's see when happen this thing we need this to make involve more community into this project.
I am sure the team have a plan and will add this coin on bigger exchange because this project has a great development. So i think impossible with a great project but not listing on big exchange. Maybe they waiting for market situation stable so that this coin not drop when entering the market, so we have to be patient.