Can you link your PRs here?
Kubernetes is such a huge project that there are few reviewers who would feel comfortable signing off an an arbitrary PR in a part of the codebase they are not very familiar with.
It's more like Linux, where you need to find the working group (Kubernetes SIG) who would be a good sponsor for a patch, and they can then assign a good reviewer.
(This is true even if you work for Google or Red Hat)
My PRs are submitted under my real name and my HN account is not under my real name, so I cannot share.
For my etcd changes I did submit to the correct SIG, but nobody reviewed it.