I don't understand why anyone think the teleportation scenes are even a thing. It's not like they captioned a timeline. Common sense tells us that there are time gaps between certain scenes. We don't need to see Varys hop from ship to ship to understand how or why he got to where he is. It's a bit skippy, but doesn't affect the plot or story. Maybe Dany lent Drogon to Varys and he flew to Dorne?