Sure it does, just not one centralized one. LLVM and GCC are very actively maintained and both main teams have many active C++ committee members. Unless you want to split hairs and argue semantics, they are the closest thing to a day-to-day development team and are quite underappreciated if you ask me.

I appreciate them but that's also the difference between Rust and C++ - the implementations are separable from the language itself. GCC is not C++ and vice versa.