Good questions. Dany's dragons flew off after her death. Their whereabouts are unknown. They're sort of a legend now. I'm probably gonna have them come in a little later but currently everyone believes dragons to be extinct. Direwolves however are more limited to the North, and more specifically the Starks. It would be uncommon to find a Souther nobleman with a direwolf but it wouldn't be a huge surprise to find a Northern nobleman with one.