https://www.lowes.com/pd/Eaton-Light...let/1001463020
This is what a 15 amp tamper proof looks like.
It can be very hard to plug into or remove something from it because of the extra friction caused by the tamper proof spring-loaded shutter.
Unless you need the tamper proofing... ask the associate to point out a 15 amp standard grade or commercial grade outlet without the tamper proofing.