Adding Exporter to Prometheus (Istio)

Hi, we are trying to add some exporters (using annotations) to the prometheus install as part of Istio. But have noticed the ‘’ only looks at the ingress-nginx, ingress-controller, and kube-system namespaces. Is it ok to add to that list - if yes, what is the preferred mechanism. Otherwise, should we install another Prometheus for our monitoring? Obviously we’d prefer to just use the instance in Istio…. Just looking for recommendations.