If you mean — Linux kernel versions jumped from 2.6.x to 3.x, so 2.21 was never released.

As of April 2026, there is for Update 2.21 . This update is intended to include features that were delayed from the massive 2.2 release .

Developer Robert Topala (RobTop) has indicated that Update 2.21 will focus on "mostly just delayed stuff" . Community predictions vary widely, with some guessing mid-to-late 2025 or even 2026, depending on the progress of complex features like Explorers .

While there is no as of May 2026, recent activity within the community and game files suggests the wait may finally be nearing its end. The Release Date Situation

If you meant — Blender 2.2x series is very old (early 2000s), and 2.21 would have been released around 2001–2002 if it existed.