Here is the full list of all 32 Miraculous: Rise of the Sphinx achievements.
Very special moment with Adrien
You have searched level 6 from top to bottom.
You have completed level 6 in Akuma mode.
BFF with Kagami
You have completed level 3 in Akuma mode.
You have completed level 4 in Akuma mode.
You have completed level 2 in Akuma mode.
You have searched level 2 from top to bottom.
You have searched level 5 from top to bottom.
You have completed level 5 in Akuma mode.
You have searched level 3 from top to bottom.
BFF with Nino
BFF with Luka
You have completed level 1 in Akuma mode.
You have searched the prologue from top to bottom.
You have completed the Prologue in Akuma mode.
You have searched level 1 from top to bottom.
BFF with Alya
You have found the sentimonster and... Mayura!?
You have saved Paris from the Machiavellian plans of Hawk Moth.
You have searched level 4 from top to bottom.
Buy all upgrades for Ladybug
Buy all upgrades for Cat Noir
Buy all the treasures at the Kwami Boutique
Clonika and her clones are now only a bad memory.
You beat Gamer 3.0 at its own game.
Buy a treasure at the Kwami Shop
You have defeated Weredad and his paper mountains.
Soundwave is reasoned, everything is much calmer now.
Finishing a first friendship dialogue
Buy an upgrade from Master Fu
You have defeated Mr. Pigeon... again!