I use Kroger pay all the time.
It’s not as convenient as Apple Pay at first glance, but the QR code it provides not only pays for the transaction, it also provides your Kroger card details and you can load it with digital coupons. Given all that, if you take the time to set it up, it becomes more convenient.
I created a Siri shortcut, so when I’m checking out I just hold the lock button which activates Siri and say Kroger
It automatically opens the app to the Kroger pay QR and uses my Face ID to authenticate.
Also, at the kroger gas station you can open the app and pay for gas at your specified pump and you don’t have to scan anything at all
Just open the Pay app, put in the pump number and how much you want and the pump starts
Great for like a mom who has a teenager that can pump gas, she can pay from inside the car, and all they have to do is get out and pumped.