Originally Posted by
hoipolloi
sounds to me there's no benefit for travellers in doing this. This is like spending extra time to help the airline find ways to reject your PCR results in advance
Mine was rejected in advance and approved at the airport.
So it doesn't seem like having it approved helps, or having it rejected hurts.
That being said, they might be trialing this to see if they can do it more efficiently through this means than to have airport staff do it all, after which point they might change how it works.