All the things I consider Canon in Harry Potter:

-The 7 Harry Potter novels
-Quidditch Through the Ages
-The Tales of Beedle the Bard
-Fantastic Beasts and Where to Find Them (the textbook)
-The Cursed Child (script)
-Fantastic Beasts and Where to Find Them, the Original Screenplay
-the Crimes of Grindelwald, the Original Screenplay
-Pottermore
-The Fantastic Beasts movies
-Articles by J.K. Rowling on WizardingWorld.com
-Statements about Harry Potter by Rowling in interviews or other
-The 8 Harry Potter movies (except the parts where it contradicts the books)
-Lights, Camera, Magic!: The Making of Fantastic Beasts: The Crimes of Grindelwald
-The Archive of Magic: The Film Wizardry of Fantastic Beasts: The Crimes of Grindelwald
-Inside the Magic: The Making of Fantastic Beasts and Where to Find Them
-J. K. Rowling's Wizarding World: The Dark Arts: A Movie Scrapbook
-Harry Potter, From Page to Screen: The Complete Filmmaking journey
-Harry Potter A History of Magic
-Harry Potter Film Wizardry
-J.K. Rowling’s Wizarding World Movie Magic, Extraordinary People and Fascinating Places
-Harry Potter The Creature Vault
-Harry Potter the Character Vault
-Harry Potter the Artifact Vault
-Harry Potter: The Wand Collection
-Harry Potter Houses of Hogwarts Creativity Journal