All 13 of the achievement icons have been updated to their proper images. It may take a little bit for them to appear in the store page, but in the achievement page, they are there for you to view.
Hopefully everyone is having a wonderful weekend.
Achievement Icons Updated
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.