I don't see that many people are using Starlight on modern versions anymore. As such, I don't see any reason to continue to maintain the mod versions, given that they do have real mod conflict issues with other mods. Starlight is also not neccessary to use on 1.20.x anyways.
Starlight may make a return in a future project of mine, but for now I am ceasing to upload new mod versions and commit updates to the github. If you want Starlight on the server, you will need to use Paper or one of its derivatives.