Do you... try that regularly?
Stores are so understaffed, you're lucky to get them to pick up the phone at all, and if they do you often won't get accurate information. They'll never walk to an aisle to see if something is physically there, they'll tell you if it's "in the system", but frequently "the system" will show 3 in stock while the reality is zero on the shelf. Or 48 in stock but they're all on a pallet in the back they can't get to.
And good luck finding a sales associate in the store itself. Quite frequently there simply aren't any -- only cashiers, a security guard, and people restocking who don't have the knowledge to help you at all.