This was a test cruise for Covid-19 cruising.
Masks were definitely worn by everyone, they really check your physical vaccine card, and the Covid test verification for your name to match your passport, vaccine card, and test.
We knew they weren’t going to have priority boarding, but they easily could have, at least for Diamond level, there were only 23 of us and some were already on board. They had a straight path to the x-ray machines, but weren’t using it. They had all the line switchbacks for queuing people, but even in the regular line at 1100am there were only about 100 people for 15-20 check ins, so there were a lot of unnecessary back and forth to get their. We were able to board as soon as we got through the process.