As noted several days ago, I wrote Vons. They (Albertsons) replied today:
Hello:
Thank you for writing to us about Apple Pay not currently working.
It is unavailable for use in any of our stores at this time. We apologize for any inconvenience this may have caused you.
Thank you for shopping with us.
Janeen
Customer Support Center
Contact ID: 38360705
--Original Message--
Comments:
Apple Pay (near field reader) has stopped working at ALL Vons, Safeway,
etc, (New Albertsons) stores for all Amex and MasterCard cards. These
cards work on Apple Pay at competitors' stores.
Here is the thread on the Apple support forums:
https://discussions.apple.com/thread/250178389?page=1