Hello!
Finally got a response from the Steam support team, which means that the release date set months ago is not postponed! The game will be available for purchase today, May 31, 2021 at 16:00 (04:00 PM) GMT with a 20% release discount.
Game release today!
Source: Steam Community (opens in a new tab)
Build and release context
Recorded Steam release date:
Within one calendar day of this post (UTC). The listed date does not establish an exact launch time.