So - we sailed in May and I uploaded all our cards several weeks in advance, and eventually they checked and confirmed my info.
My Wife and I sail again in September and 2-3 weeks ago I uploaded my card, same process as always. Didn't have my Wife's and got lazy. Went back and tried again a week ago and my card info was gone, as was the ability to upload. I assumed they were in process of dismantling most of the covid program that involved any added cost/effort for them, after the CDC changed their guidance.
Basically I think you can't upload your card any more because they're scaling their covid program back. I think I read we just have to bring our cards with us.