Correct. If you would like to get up and running now, try ruby:3.2.0-slim-bullseye. This won’t be as memory efficient as a version of ruby compiled with jemalloc, but you can get the same effect by adding a few lines to your Dockerfile: Preparations for Rails 7.1 - #13 by wjordan
I’m sure that a 3.2 version with jemalloc included will be posted shortly, and you can choose to change back at that time.