They were asked to print their code and typically this is done as part of diligence _before_ closing. This is not sop. It’s Elon making a show of things.
Airbnb allowed folks to keep their laptops after their recent round of layoffs. Presumably these laptops are managed by IT with the ability to remote wipe.
If not, I feel sorry for the folks in charge of rounding up all this hardware to likely sit around and rot.
I can confirm at least the first 6 digits are MMDDYY based on the date that I saved it into 1password. The last 4 digits seem like could very likely be hhmm.
Edit: Can confirm: The pin is the exact date/time stamp that my freeze was applied. I'm able to tell based on another note saved to 1password. It is within 1 minute :(