When adrien first tried to perfect shapeshifting, he tried to turn into either nino(his bff) and Gabriel (bc he still loves him and doesn’t know the truth). But instead he ended up turning into marinette bc she was the only one consuming his thoughts after the break up-
Imagine Adrien perfecting how to change his suit's appearance just like Lila does and the best part is that it wouldn't even be his first time doing it
Cat Walker is proof enough that he's capable of it. That's probably also why he realized Aglaé wasn't real (aside from the important details like the super strength and the suit changing from one form to another), because he already knew it was possible to create an entirely new identity, which isn't the same as just changing certain details of the suit
And at some point, Chat Noir manages to trick Chrysalis using her own shapeshifting trick.....
"This cat isn't as stupid as you thought, huh? Your little magic trick? Yeah, I know it too."
#MLBS7Spoilers