Thanks for the advice, I'm out of that warranty by a bit.It’s called a bonus fastener.
They dropped it during assembly and just got another and then failed to mark the tailgate for repair so it could be fixed.
It’s sadly common and a pita to fix a lot of times. I had a bonus screw in my sunroof track in a Challenger I had. It took me two weeks to find it and three hours to disassemble the car to get it out and three more hours to put it back together.
My dealer turned in a warranty claim for that one.
You should be taking these vehicles to the dealer if it’s under warranty.
That’s the only way the assembly plant gets notified of their issues.