Looks like I was right, but it is online only now, not in store.

The Chase Sapphire Preferred offers 3x points on online grocery stores (the Chase Sapphire Reservedoesn’t offer any additional bonus points on these purchases):

• The online grocery (excluding Target, Walmart, and wholesale clubs) category includes purchases for grocery pickup and delivery that are placed online with grocery stores, specialty food stores or delivery service merchants that classify as grocery store merchants (excluding membership and subscription fees)
• Meal kit delivery services are included
• Some merchants that sell grocery items are not included in this category; for example, larger stores that sell a wide variety of goods and groceries like Walmart and Target, wholesale clubs such as Costco and BJs, liquor stores and merchants that specialize in only a few grocery items