Amazon Managed Prometheus and Istio

Hi im new with Istio. I have an already running AWS Managed Prometheus server with Grafana in EKS cluster. since im trying to use Istio i need to reuse my prometheus and grafana instances to get the microservices and istio-controlplane metrics i’ve been trying to do it following istio documentation but its not cleare enough, i will be thankful if anyone can give me a hand with this.