If he can’t excommunicate Cuomo, who can??? The laity surely can’t!!
Cuomo's eternal fate isn't determined by the church or it's officials or Cuomo's standing in the church or even his excommunication. It is determined by Jesus on what is in Cuomo's heart and his relationship to Him.
But from his obvious behavior and actions, it doesn't appear Cuomo is doing well on that front. He had best repent and believe in Jesus as Lord while he still has the chance because Hell is a long, long time and God is a righteous God and He sets the rules, not some church functionary.
But Cuomo has committed an offense which can (and imo, should) result in being forbidden to participate in Communion.
He is giving scandal and he is complicit in the grave offense of supporting abortion.