First time positing, please be gentle.

Don't think it's been posted anywhere so thought I'd put it up as I've just ordered this deal.

When I ordered via KFC App it let me choose 4 different burgers and you can also order the Stacker Burgers at an extra $3 per burger.

It does say at the bottom: "This offer is not everywhere and not forever"

Once you select your store on the KFC App you should see the deal under "Shared Meals" option, if it's not there I'd assume that store isn't part of the promotion :'(