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