Just so happen to look through my old emails only to find out that Stairway games sent out an email to confirm the region the game back on Nov. 4th. I usually rely on KS Updates for news on the game and I don't recall seeing a notice of needing to confirm a region for the game once in any of the recent updates. Today is the first time I'm seeing this email and I wonder if that is why myself(and maybe a few others who select PS5) haven't received their codes yet.
Are the ones who received there PS5 codes so far also the ones who filled out the survey(which is now expired)? Is there anyone who is currently playing on the PS5 who did not fill out the survey? I sent an email a few minutes ago regarding my region, but hard to say how long it will be until I get it now. If you haven't received your PS5 code yet, it might be worth emailing them as you can.