If you go on the Walmart site and adjust the filters, you are able to see which products are available for shipping in your search. Walmart plus has come in handy for me twice this week as I was recovering from Covid. You can choose products that are available for pickup, shipping, or delivery. It's a pretty great feature - just adjust the filter. You can also clearly see the difference as the products are labeled with small icons on the search and product page.

FYI, free shipping is still with orders $35 and up. Otherwise, a fee applies. I've just done delivery, so I'm tipping. I'm getting my orders a few hrs later. It's worth it as I haven't been able to leave the house