Hey guys this is just a little theory I made up.
Reminder: I have not read The Mortal Instruments or The Infernal Devices. Sorry if I get anything wrong.
Ok, so you know how TID came out after TMI, but is set before them? Well, what if ACOTAR is like TID, and TOG is TMI? Maybe Wendlyn is Prythian, after Rhys and Feyre have saved the world, Tamlin, Jurian, Ianthe and the king are dead, and all the good guys move to some remote island with Myriam and Drakon. Remember, SJMaas never shows a map of Wendlyn. Maybe that's why.