go to the reservation, click on "online check in" or "continue check in" or whatever you see under "online check-in status", then click "view port arrival form".
I was able to add my QR code to apple wallet but get an error when trying to add DS's or DH's. Anyone been able to resolve that? We were supposed to cruise in January (cancelled after online checkin) and I didn't have an issue adding all 3 to my apple wallet.