Summary
Despite only having been out for a few days, hoardes of Pixel 5 owners have been reporting a gap between the display and casing of their new device.
Google is yet to publicly acknowledge or respond to this issue.
My thoughts
As a Pixel 5 owner myself seeing this issue, I am concerned about how Google have handled this. It also brings the longevity of the device into question.
Sources
https://support.google.com/pixelphone/thread/77741994?hl=en
https://forum.xda-developers.com/pixel-5/help/assembly-problem-gap-screen-case-t4177669