I'm not sure Skyvector's source for low-altitude IFR charts outside the USA. The web interface does not identify the names of charts being shown, so they must have some kind of a worldwide base layer with a format similar to American IFR charts. They are definitely not the Canadian IFR charts.
Here is Skyvector's view of Winnipeg:
View attachment 113810
Here is what FltPlan.com provides:
View attachment 113811
You'll note that, among many other details, Skyvector's depiction of Canada provides next to no information about airspace.
Nor does an IFR chart help with VFR flying within the USA, especially the problem described in post #73. At least for Canada there are VFR charts available, although they are fairly inconvenient to get and tremendously inconvenient to use for flights that only go near the border, not across it. For Mexico, it sounds like there is presently no chart of any sort available to civilians that provides any VFR information for the Mexican side of the border.