Also, even if they handed you the piece of paper proving it's completion it wouldn't do you any good because let's face it, with or without it, the repairs would still be covered under warranty even if they're not supposed to be, and it's not like you could hold them accountable for anything. You can ask them for the PDI RO and if they're nice they might give it to you, but all is gonna say is yep, they did it. Which doesn't mean they actually did...
Many dealerships fill out the paperwork, submit it to the manufacturer, get paid for doing the PDI, and never actually do it. They just take off the wrapping, park it in the spot and call it good. This is why many times you go to test drive a vehicle and the battery is dead and won't start, or the tires are low, or there's flat spots in the tires, or it only had 2 miles on the odometer (never test drove it), etc. Many more tell tale signs they didn't do a good PDI, or they don't maintain their vehicle preventing "lot rot"the term used to indicate component failure due to sitting on the sales lot for too long without regular maintenance.
I guarantee that there's gonna be thousands of dead batteries due to no one maintaining them during the pandemic. Which is actually the sales department responsibility, but usually gets charged through warranty, which is then charged back to the dealership for not following policy... Anyway... It's something I deal with a lot...