I keep hearing big box stores - target, Walmart and Costco. None of them will deal with IngramSpark or self publishers. I walked in there by foot . I also submitted my book on their distribution links and get denied for being g self published. Ingram won’t even allow a spine text unless a children’s book is 48 pages.
Ingram makes your book available on WalMart Online, Target Online, and Barnes & Noble Online. Local managers are not in charge of inventory acquisition.