Hey everyone, I had tried couple of times to go over this with the Garmin support team, but it doesn't seem that they can provide me with a definitive answer on the matter or they simply banish in the abyss of the interweb to never answer again.
I bought my descent here in China, the device came pre-loaded with a bunch of maps which I found amazing. The issue is that these maps for other regions seem not to have any information whatsoever for the areas they supposedly cover.
Here is a full list of the installed maps on the device: