A product that was announce for preorder cannot be found either on the 'dice' accessories page or on the Beginner Box page.
https://paizo.com/products/btq026ir/discuss?Pathfinder-Beginner-Box-Dice-Se t#1
Is not available when you use the breadcrumb Pathfinder>Beginner Box that shows on the top of that page. You instead have to know how to navigate to the announcement page.
Store>Pathfinder>Accessories>Dice doesn't take you there either