The nix package manager get more and more attention and it would be great if the solid server would be available as nix package. Also the replit web IDE sould be a target for offering nix packages and a replit template for solid development would be a great offer for solid developers.
For which solid server? If you’re talking of CommunitySolidServer, then it’d be up to that project.
I can’t speak for them, but most likely they’d want support from users on those platforms in publishing platform specific packages, as maintaining that isn’t any small piece of work.
They do currently publish a docker image, which may be of interest (though it’s owned by solidproject still, not their organisation): Docker Hub