No, they haven’t. Your conspiracy theories aren’t clever or helpful.
City’s is a far more complex case that will take longer to deal with, and any potential sanctions will be handed down by an independent commission, not the PL.
Everton broke the rules, in a much more simple case, and have been punished for it. It has nothing to do with City or Chelsea.
Just how? He’s jumped and headed the ball. Not like he’s thrust an elbow, it’s just part of his jumping motion and his hand has flicked a bloke on his blindside. Genuine shocker that they’ve probably only given to compensate for the one they didn’t get earlier.