1. install minkube
2. add alias kubectl='minikube kubectl --' to .bashrc
3. add source <(kubectl completion bash) to .bashrc

result:
only the commands get tab-completed, nothing after that.

the underlying issue is this:

$ minikube kubectl __completeNoDesc get p
Error: flags cannot be placed before plugin name: --cluster

this works however:

~/.minikube/cache/linux/v1.22.3/kubectl __completeNoDesc get p

related to this: kubernetes/kubectl#884