Is there a way with the rabbitmq provider to create an exchange with the internal bit set? Currently you can set the durable and auto complete flags, but there is no mention of internal: rabbitmq provider documentation
Is there another way to apply the internal flag that is not documented?
I have no direct experience with RabbitMQ, but the usual answer to this kind of Terraform question, is that if the provider lacks options, it will be necessary to write, or get someone else to write, a new version of the provider that supports them. There is no “escape hatch” to force unimplemented options.