When will we see the official image with jdk21?

Unless I'm very wrong, the official images use Eclipse Temurin as their jdk. As Eclipse Temurin JDK21 isn't even released yet, then I don't expect the offical images to be out anytime soon...

Eclipse Temurin is waiting for the TCK from Oracle to be released before they can even do a cut of the build. You can find their checklist here