These writers are hard to read.. cannot give them too much credit.. but.. wasn't that White Horse the one the leader of the Golden Company was riding?
In a general sense, perhaps it only means she's "good" now.. was broken out of her badass killer assassin mode. Maybe she and Gendry can set up house now in the Stormlands. Maybe she's pregnant.. maybe that's why she was looking at mother and child on the way in and tried t save them (getting them killed).
I think it will be hard to wrap things up unless they have a big time lapse. That is.. There is no High Septon, no Sept of Bailor, no Throne Room or Iron Throne (unless Drogon was highly selective and Dany an engineer).. how can she or anyone else be crowned and sit that throne?
But it has to happen, right? It is A Game of Thrones... and in A Song of Ice and Fire.. they already got the Ice and Fire done.
So.. if we assume some amount of time passing at some point, to allow a coronation, they can do just about anything.