Last time I went to Cozumel in 2019 (with NCL, not Royal), XPLOR park was an excursion my group of friends scheduled. It’s a zip line/cenote/cavern swimming/jeep jungle driving experience that was 100% worth the money for me. It’s definitely a high key/active excursion but really made my cruise experience. Between zip lining above large swathes of trees and highways, through waterfalls, and the included buffet, couldn’t have asked for a better end to the week.
Keep in mind that it’s a bit of a drive/boat ride from the Cozumel port, though still accessible. It’ll probably be one of the more expensive day experiences but is worth every penny.