well bare in mind we dont know how the suggestion process works. he has said that they suggest characters but when talking about min min's inclusion it sounded like they suggested the game rather than a character. and he was still able to chose pyra/mythra over rex so he does still have a certain degree of control.Well, he doesn't pick his own characters, however he gets suggestions from Nintendo and in the end it's still up to him whether to include the characters or not. If Sakurai thinks it is too difficult to include a fighter, then he can decline the suggestion.
Assuming Nintendo had suggested Phoenix Wright amongst other characters in 2019 for the Fighter's Pass 2 and assuming Sakurai hadn't played Ace Attorney before, wouldn't it be difficult for him to decide whether he can implement Phoenix in Smash? He'd probably have to play Ace Attorney first and then decide and this takes some time.
But yeah, maybe Sakurai already played Ace Attorney (there was this one photo with Sakurai and Takumi), so who knows, he might even be a fan of the games. It would be a dream come true listening to a Sakurai Presents were he talks about Ace Attorney and Phoenix' moveset origins for 30+ minutes.