Comment by ahmedtd
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)