You're not supposed to distribute the precompiled module file. You are supposed to distribute the source code of the module.

Header-only projects are the best to convert to modules because you can put the implementation of a module in a "private module fragment" in that same file and make it invisible to users.

That prevents the compile-time bloat many header-only dependencies add. It also avoids distributing a `.cpp` file that has to be compiled and linked separately, which is why so many projects are header-only.