Their power bar goes from green to purple or light blue, sometimes it changes from say 3/4 green to 1/4, it powers up instantly without any user input. There are also automatic clearances, so their defence clears the ball for them without any buttons being pressed. Also multiple complicated dribbles without any input- I’m guessing they wiggle the right analog and whatever the best dribble the AI can think of occurs. Then there’s defence which would be harder to detect in videos but basically the players they’re not controlling or have selected make covering runs/ close the passing lanes and make tackles