Gitlab managed Kubernetes privileged runner

I have an AKS instance connected to GitLab.com. After that, I added a private CI/CD runner with 'install runner on kubernetes", which is deployed and works, but I can’t build a docker image on it. After doing some research I realized, that the runner is probably not in a privileged mode, but I find no way to change this, and there is not a single description about this.
Can someone provide me a solution here?

Thanks

No one can help with this? How you make your private runners privileged?