To view the Canadian Alaska Highway VFR chart, go to the Maps page and make sure that the CANADA VNC map layer is selected from the dropdown in the upper left.
Next tap on the Map SETTINGS button (looks like a gear) and then select MAP TOUCH ACTION and then choose BRING CHART TO FRONT WITH LEGENDS.
Now, close the settings menu and pan the map to an area covered by the Alaska Highway chart (eg: Whitehorse - CYXY). Single-tap the chart to cycle through the charts layered in that area. The chart that extends diagonally upwards towards the northwest is the Alaska Highway chart. You can confirm this on the chart collar.
Image 1. Alaska Highway chart displayed.