The war is over, Hogwarts has been rebuilt, and people are still healing. And what better opportunity to enjoy your final year without a deadly threat stalking you. Harry, Ron, and Hermione agree to return for their eighth year, finish their studies, and get their N.E.W.T.s. now, all of them fully presented.
A completely ordinary day at the Red Keep, Queen Alicent with her problems, her sons Aegon and Aemond out and about with their dragons. Rhaenyra and her children also in their own world.
At the end of the war, Harry Potter only saw Malfoy one last time, in court, where Harry testified to save the Malfoy name from an Azkaban sentence. And his presence was brief.