McGonagall helping trans students create spells to change their body to alleviate dysphoria

Flitwick showing trans students how to charm themselves to always be perceived as their gender identity and to never be misgendered

Slughorn giving lessons on potions that can stop or start facial hair growing

House Heads creating dormitory rooms for non-binary students if they want them and letting trans students choose which section to live in

The new History of Magic teacher including trans wizards in the curriculum

Hagrid making sure the other students are respectful when unicorns approach trans girls

Hogwarts students setting up a clothing exchange for trans students who can’t buy the robes and other clothes they want because of money or family issues