Those 3 maps are still available in single player. In earlier versions a multiplayer match against an AI on Raven's Realm started you off at quite a disadvantage (though that is also the case in a custom campaign). Presumably a separate multiplayer version of the map could be made with changes to the starting territories, units and upgrades.
Meaning they removed them on purpose in a recent update and it's totally normal they are missing?
I checked my GoG-Version (Retail came with both) and they are still present there
