I find paying via QR code to be much less convenient than NFC that is more popular in the west. Tap and pay is really quick, especially in countries like Australia.
With "App Clips" or "Instant Apps" or whatever you want to call them QR codes for me take the lead again. Get a receipt at the table, open camera, scan, app pops up with receipt, add tip, click click pay, done.
Skipping the second waiter trip to swipe all the cards or the awkwardness of bringing out the PoS system to the table is immediately worth it to me.
Ya, I get that. Red Robin has screens/computers/payment kiosks at each table to avoid that problem. They won't use QR codes at sit down restaurants in the states for payments because of tipping, however. Psychologically, you are more likely to tip more if the waiter is directly involved in the billing.