There are package managers and build systems. MS ships a build system with visual studio and msvc and they have a fairly capable package manager in vcpkg.

I like cargo better than any c++ tooling but those tools don't really make a ton of sense for c++ where every platform has a different compiler.

Ultimately, I agree. I don't think I'll be going back to c++ any time soon, but for me it's more about the tooling fragmentation than the tooling itself. I actually like the language itself.