Istio Strict mTLS + Prometheus

Hi there
Trying to get Istio, Kiali and Prometheus working using strict mTLS but I am miserably failing.
Their documentation mentions mounting the cert, key and ca via a volume and doing some magic with annotations but I have not been able to find a way to deploy Prometheus via the operator with the correct annotations using Helm.

Has anyone actually made this work? All I encounter when searching for this is failed attempts. No examples, just frustrated souls looking for an answer.

Are there any saviors out there?

Kind regards,