In the top left hand corner of the screen do you see a 4g symbol? Just to make sure data is active.
So I finally got to ring my dealer and they were very surprised the car hadn't downloaded the update by itself, and they pushed it right away, so now my Evoque's updated to 20B something.Are you still on version 19 ?
It could be just a region thing and it will eventually turn up.
You could ring your dealer and get them to check and see what is going on.