I don't see CRUD methods for Status/Scale handling for Custom Objects in:
https://github.com/kubernetes-client/java/blob/master/kubernetes/src/main/java/io/kubernetes/client/apis/CustomObjectsApi.java
I thought this was part of the v1.11 API, for example here is an auto-update commit for the python client:
kubernetes-client/python@17db994#diff-343e382f5d0f69190bf247217a71f38a