Could this be uploaded to Modrinth? It is one of the only mods in my pack that isn't on Modrinth so an upload there would be awesome! If a Modrinth release isn't planned, is it okay to distribute your jars in my pack?

I have no plans to upload artifacts to Modrinth for the foreseeable future. You may distribute the jars sourced from CurseForge within a Modrinth pack.