Void-Rebind is a mod for Void Bastards that allows you to rebind the mouse buttons.
Void-Rebind uses Bepinex with MonoMod.Loader.
Instructions provided in the release.
Run Void Bastards. Go to Keyboard Options.
Copy the files from the Void Bastards Managed folder into the Libraries folder and make sure they're included as references. Then, build MouseRebind.