Is it possible to load chunks on a server without the need to fly around?

I made a server for my friends to join and used my already existing world, where I already preloaded chunks using Chunky, so that the world looks nice. The chunks, as mentioned in the FAQ, do not load on their own. Chunky on a server doesn't work, or maybe I can't make it work, I just set a radius and sent a start command. Did I do something wrong? Is there any other way to do it?
1.20.4