Striker plate cover, who has them?

[Thrust]

So an interesting find when we got back from our trip. I was vacuuming the sand out and looked under the passenger seat and found a plastic plate. Thought it maybe from one of my wife's phone holders.
So today I googled the part number and found out it's a door striker plate cover. https://www.gmpartsdirect.com/oem-parts/gm-front-side-door-latch-striker-cover-13574802
Funny thing is I only have the one. None of my doors had one. Not sure where this fell out of as I've looked under that seat before and it wasn't there. I looked under the rear cargo storage and none were there either. Ive had the front drivers seat out before and nothing was under it.
For reference, early build 2015 Yukon Denali XL and we've owned it since 11/2016.
Who has these installed and who doesn't?

 

[Doubeleive]

my 18 silverado does not have the slots for one, but the wife's 16 burb does and has none at all. I wonder if that was a trim option or was used based on the vehicle paint color or something or if they are just prone to break and all of her's are long gone lol

OR even more likely GM penny pinchers taking stuff away as usual

 

[Thrust]

Good question on what trim these got installed. My CT6 has them, look exactly the same.
I'm more curious of who on the board has them installed and what model trim are they. I only found one other post on here about them.

 

[RST Dana]

Found mine in the rear compartments a while back. I popped them on and like the look!!

 

[Thrust]

I found the other 3 covers last night when I went to change out the cabin air filter. They were in the glove box in that RH side pocket. Either I was blind or didn't pay much attention to what was there all the times I've opened the glove box. Regardless, they are now installed.

 

[Doubeleive]

I found the other 3 covers last night when I went to change out the cabin air filter. They were in the glove box in that RH side pocket. Either I was blind or didn't pay much attention to what was there all the times I've opened the glove box. Regardless, they are now installed.

weird I wonder if that is a part the dealer is supposed to install upon delivery