u/Mi-kou-wai

What the title says. I thought you just had to play as a Hellenic country and when the Ptolemies get the island, you get an event that allows you to tag-switch. However, it didn't happened when I was playing as Rhodes. I then started a new campaign as the Ptolemies, occupied all of Cyprus and enacted the decision "Kings of Cyprus" or sth like that but it didn't give me the option to play as Cyprus. What can I do to play as that island, aside from control commands or occupying all of it and losing all the other territories?