Here is the full list of all 42 Persona 5: Dancing in Starlight trophies - there are 26 bronze, 12 silver, 3 gold and 1 platinum.
Obtained all trophies.
Watched all Social events.
Unlocked all Custom modifiers.
Obtained all the accessories.
Obtained all rewards from the Twins' card hunt.
Watched every possible dance for the P5 Protagonist (Ren Amamiya).
Watched every possible dance for Futaba.
Cleared the stages where Ryuji and Ann dance together.
Cleared a stage with both "GOOD ratings won't break combos" and "Game Over with combo break" enabled.
Obtained all the costumes.
Cleared a stage after changing Hype Gauge difficulty in Custom.
Started a stage on ALL NIGHT difficulty with 10 or more Challenge modifiers enabled.
Obtained all the pairs of glasses.
Explored all the guys' rooms.
Cleared a stage with both "Note paths waver" and "Note speed fluctuates" enabled.
Cleared a stage with 5 Challenge and 5 Support modifiers simultaneously enabled.
Had the Twins join the grand ball.
Obtained an invaluable treasure upon the stage.
Explored all the girls' rooms.
Cleared a stage on HARD or harder with all Support modifiers enabled.
Obtained 5 rewards from the Twins' card hunt.
Obtained half of all the accessories.
Watched 40 different Fever Time dances.
Changed costumes and played a stage with each of the Phantom Thieves (excluding Akechi).
Started a stage with a different hairstyle, two accessories, color contacts, and a colored wig.
Registered a costume as a Favorite.
Explored a friend's room.
Cleared the stages where Morgana and Haru dance together.
Cleared a stage on HARD or harder and earned a PERFECT rating on at least half of the Notes.
Earned the highest possible grade on a stage (KING CRAZY).
Obtained half of all the costumes.
Unlocked the highest difficulty level (ALL NIGHT).
Watched 20 Social events.
Cleared the stages where Yusuke and Makoto dance together.
Unlocked all ???s in Collection.
Beat your own high score.
Failed a stage.
Played a tutorial.
Watched a replay.
Watched a Social event.
Cleared a stage.
Obtained a costume.