Welcome to the community @Praba_Karan!
MongoDB Atlas is currently only available as a managed service for AWS, GCP, or Azure. You can set up a secure network peering connection to a virtual private cloud (VPC) within one of those providers, but all of the Atlas infrastructure is managed by MongoDB.
If you want to manage your own on-premises MongoDB deployment using Kubernetes, you can use the MongoDB Enterprise Kubernetes Operator together with MongoDB Cloud Manager or Ops Manager.
There is also a MongoDB Community Kubernetes Operator if you are not using Cloud/Ops Manager or MongoDB Enterprise.
Regards,
Stennie