"Barbiecore" is a word now.
It means "Barbie-like accessories and clothing" usually in bright pink, and it's all over the internet! The word hasn't made it into the official dictionaries, because it's only about a month old, and I don't know how long it takes dictionaries to add words.
And if you want proof of a film being overwhelmingly successful, I'd say that inspiring brand new words is right up there.