Here is the full list of all 46 Hogwarts Legacy trophies - there are 28 bronze, 15 silver, 2 gold and 1 platinum.
Complete all collections
Spend all Talent Points
Reach Level 40
Defeat enemies in all battle arenas
Breed every type of beast
Unlock all Floo Flames
Win the House Cup
Find all Demiguise statues
Complete Natsai Onai's relationship line
Complete Poppy Sweeting's relationship line
Complete Sebastian Sallow's relationship line
Defeat Ranrok
Complete all Merlin Trials
Complete all side quests
Discover all cairn dungeons
Use Ancient Magic on every enemy in the game
Subdue the Lord of the Shore
View all Pensieve memories
Beat Imelda's time in all broom races
Rescue the phoenix
Visit Poidsear Coast
Wield a Deathly Hallow
Reach the highest point in the castle, the Headmaster's upper study
Reach a combo of 100
Grow every type of plant
Use Flipendo ten times – to tip one cow or several
Learn all spells
Save a dragon
Defeat a total of fifty enemies using Petrificus Totalus
Stun 10 different enemies using a Mandrake
Brew every type of potion
Upgrade a piece of gear 3 times
Upgrade a piece of gear
Complete all tiers of a challenge
Meet Charles Rookwood in the Map Chamber
Follow butterflies to a treasure
Spend 5 Talent Points
Find the Map Chamber as a Gryffindor
Invoke Ancient Magic for the first time
Survive the troll attack on Hogsmeade
Attend your first class
Complete the introduction and finish the Sorting Ceremony
Obtain all other trophies
Find the Map Chamber as a Slytherin
Find the Map Chamber as a Hufflepuff
Find the Map Chamber as a Ravenclaw