On automatic exchange, first of all, the revenue agencies under the treaties are tasked with the administration of the treaties, and they can enter into agreements among themselves—MOUs—on any aspect relevant to the administration of the treaty. In most cases, automatic exchange information is achieved by way of concluding a memorandum of understanding between taxation authorities.
Of course, both taxation authorities must be willing to do that. If they decide they're not interested, there's not much we can do.