There’s a rule clubs owned by the same owners cannot be in the same UEFA competition, and Girona and Manchester City are both owned by the same football group owned by a Qatari. So, would Girona not be allowed or would neither be allowed? Or would they be given an exception like RB Leipzig and RB salzburg?
Toulouse and AC milan, leipzig and salzbourg all play in european football despite having the same owners. They can definetly if they are willing to change their administrative structure.
Toulouse and AC Milan have the same owner but they don’t play in the same european competition so it’s allowed.
But potentially they can easily play in same competition but nobody will stop them anyway. Same applies for Brighton and Royale Union already, dirty cheaters.