Purchased Content/Maps Not Showing Up in Maps

I have purchased a book, Tales from the Yawning Portal.  The maps from it are not showing up in the Map Browser.  Why is this?  I realize I can download them and then upload them, but doesn't that defeat the purpose?

Tales from the Yawning Portal predates the existence of the Maps VTT by several years. They have not added all the maps from all the older books to the VTT yet, and while they've said in the past that they plan to eventually, I don't think it's a big priority for them right now.

Thank you.