The Latin America VFR layer now includes government-sourced VFR charts for Mexico, providing local geographical and aeronautical details.
You can add this region to your ForeFlight subscription via the ForeFlight website and select countries in More > Downloads > Region Settings to download charts.
FAA-sourced IFR enroute charts covering the Caribbean, Mexico, and Central America are also already available as part of both the Latin America and U.S. regions.