I am so showing my age by knowing the title of that song! On the KDP platform, when you check your sales reports they are separated geographically, for the Kindle stores in the US, the UK, Germany, France, Italy, Spain, Japan, India, Canada, and Brazil. When I checked it yesterday, I swear I saw an entry for "amazon.com.mx" which could only be Mexico. Right now there is no Kindle store in Mexico; if you type "amazon.com.mx" into a browser, it redirects you to the regular US-based amazon.com.
This morning the amazon.com.mx line is gone! Missing! I think someone goofed and released something early (or maybe they were testing, and it was deliberate) and this means Amazon will open a Kindle store in Mexico. I wish I had thought to take a screen shot!
The good thing about self-publishing is you own worldwide rights to your own work, so you can publish worldwide from any platform that supports global sales. Olé!