I am booked on an Easter sailing for 2023. From what I have heard (through the FB grapevine) from those who were onboard for Easter 2022, they had a lot of activities.
If you are religious, they had 1 or 2 church services/masses onboard (this is based on if they have a priest onboard), Egg hunts, Easter family fest on the boardwalk, Easter Origami, and some other things. Definitely count on at minimum dessert, chocolate eggs, fruit bunnies, etc.