48-72 hours after the initial panic my local large food store had literally more toilet paper on the shelves than I have ever seen in there before. However it was all super low quality and from brands I've never seen before or since.
With the world shutting down the companies that supply those kinds of places had a warehouse full of inventory and most of their usual customers either were entirely shut or going through a lot less product.
I'll wager your grocery store called one of them up and got a few pallets to resell, creative move on their part.