I can confirm they look at lots of things; I applied from the next state over and still was able to get auto-approved, but they verified literally everything.
I had to enter my DL#/state, they sent a text to my phone (during the application process) and I think even a couple of security questions (it's been a year so I'm fuzzy on that). It was definitely the most thorough application process I've ever been through for a credit card.
Also, if you have any of the secondary bureaus frozen/locked that might make a difference as well.
