That’s not quite how it looks to me. Your pull request wasn’t specifically to support OCaml, which is not a first-class programming language at Google, but to correct deficiencies in the C interface— and C/C++ is a first-class programming language at Google. Of course, your changes were welcome. And yes, of course you’re invited to keep them informed about progress in your completely external project developing OCaml bindings for gRPC— provided you aren’t asking for any OCaml logic to be introduced directly into a package so widely used within Google.
Because that would get you a completely different response.
Which is to say: nobody here should waste any energy trying to get OCaml into the gRPC reference implementation. As it happens, I completely agree with others here that gRPC support for OCaml programmers could be hugely important to growing our community. I just don’t think it will happen at all if it requires active collaboration with the maintainers of the gRPC reference implementation.