No obvious COVID protocols anymore. I've cruised multiple times since January, and the protocols have eased over that period of time. I stick to my own protocol, and several of the people I cruise with do, too.
We don't get on crowded elevators, and if we are on and it gets crowded, we get off.
I wear a mask on elevators, the theater, and in the Windjammer except when I'm eating. I also use my own and the ship's hand sanitizer frequently. You're basically on your own for health protocols. I'm on day 8 of a 9 night cruise, and I tested myself today. Negative results, so no infection from airports, restaurants, hotel, shuttle, and ship.