I have gotten 3 out of the 4 new achievements that came with 1.21. The one that is giving me issues is the Over-overkill achievement. As the attached video shows, I can do it in Java Edition just fine. In Bedrock, however, I have done the same procedure more than once, but no achievement has appeared.
MCPE-182921
Over-overkill achievement won't unlock
Resolved
Cannot Reproduce
2
*Edit: After, multiple attempts, I did manage to get the achievement to pop three days ago. Apparently, the achievement system is just very delayed.