FWIW, the contactless chip on my SPG Luxury card is inoperative.
The new rose gold PRG contactless works.
So I'd test it somehow first (I used an Android phone I had lying around with the NFC Tag app).
As for Square, I have multiple transactions where Square coded as "Restaurant - Bar & Cafe" (for Blue Bottle Coffee in SF) isn't showing 4x online. But I don't think it's 100% accurate until the statement closes and you can see the bonus points awarded under Membership Rewards -> Points Summary. Will be interesting to find out. The CSR earns 3x there.