Ramesh D Greetings!
I haven't found any documentation on deploying Azure IoT Edge on Minikube over Raspberry Pi.
You can check Azure IoT Edge on a Raspberry Pi 3 documentation, which provides step-by-step instructions for deploying Azure IoT Edge on a Raspberry Pi.
Also, see How to install IoT Edge on Kubernetes documentation, which provides instructions for deploying Azure IoT Edge on a Kubernetes cluster. While this documentation does not specifically cover deploying Azure IoT Edge on Minikube over Raspberry Pi, it may provide some useful information for your POC.
Hope this helps you start the POC.
Do let me know if you have any further queries.