Three out of nine of our family group on the July 8 Oasis cruise tested positive within 24 hrs of leaving the ship. All were boosted and tested negative to get on the cruise. My wife and I wore masks while being out in public she got it, I didn’t. Based on the feedback I saw from our group postings about 10% ended up positive post cruise.
You won’t be able to make any show reservations until you get on the ship but it does allow you to link reservations for multiple folks. You must have the Royal application on your phone to do it, the WiFi is free for reservations.