I enquired via the Mazda CS webpage, response below:
"The map updates are supplied to us by both Mazda Europe and Mazda Japan. We are not given a date in which the updates will be available and are just sent over the software when it has been constructed.
I would recommend either continuing to check for these updates on the Mazda Toolbox, or alternatively, staying in contact with your local approved Mazda dealership who will be made aware once the update is available."