Thanks, I did not know such diagram existed.
While I remain cautiously optimistic in the context of the diagram that BIND9 could potentially be reconfigured to perform both its current role as locally accessed recursive resolver and the purpose for which I’ve been spinning up additional VMs (actually containers at the moment) I am certain that it would be seen as too big of a change unless its done as part of a bigger project to better support external DNS configurations. such as mentioned in: