Add annotation to istio-ingressgateway deployment using Istio Operator config?

Is there a way to configure the IstioOperator object in order to add annotations to the istio-ingressgateway deployment object? I see properties for configuring pod annotations and service annotations, but I’m not seeing anything for the deployment itself.

My use-case is that I want to add the annotation 'true' to the istio-ingressgateway deployment, so that wave will cycle the istio-ingressgateway pods whenever my TLS cert secret is modified. Wave looks for annotations on the deployment object, not the pods so podAnnotations doesn’t work for me.