You probably picked the wrong day to shop there. Many stores only fill the shelves one day per week...... some one day per every-other-week.
At my two nearest Walmarts', I know what day of the week the store oil shelves are stocked. Much like this topic, I was always going for my oil a day or two prior to the 53 ft trailer arriving to restock items on store shelves.
As far as 10w30 goes, it's a slowly dying grade of ILSAC / GF6 / API.......etc. New vehicles today that gather around the Dexos Standard, have little use for grades that are not inside Owners Manuals of 2024-2025 models.
Our (2) Hyunkias' love their 10w30. I made sure to include it (along with 5w30) in my HPL order purchase.
0ne grade I will never buy again for these 2019-2020 Hyunkias is 0w30 Euro. A very expensive engine sound failure. I never thought the day would occur when I would fill my sump with $14 a-quart oil and need a bottle of Rislone to quiet the engine.
It seems like every-other-decade Rislone comes to my rescue for something. It's a product I trust, dating back to the early 1970s with noisy lifters, on the last Ford that I will ever own.