The title says it all.

In your Modrinth page, which I am pretty sure is this - https://modrinth.com/datapack/tectonic, the mod is licensed as MIT. However, in the actual source code of the mod, inside fabric.mod.json, it is licensed as All Rights Reserved. Not too big of an issue, but just good to change for any confusion, feel free to tell me if I am missing anything.

Thanks for catching that! It's all meant to be MIT, I'll fix that in the mod metadata files when the next Tectonic update drops.