Some Resources' Namespace is Hardcoded

Some resources have hardcoded namespaces, including the gateway, authpolicies, and peerauthentications. e.g: https://repo1.dso.mil/big-bang/product/packages/istio-gateway/-/blob/main/chart/templates/gateway.yaml#L5

This creates additional hurdles if desiring to use another namespace like istio-ingress as istio's documentation shows.

Can the namespace of these resources be templated?