I'm inclined to give this particular user some weight, since he is one of Pterodactyl Panel's contributors. Further, since I've done nothing other than install the RC (which included a Docker version update) and container statistics now work, I think it's got decent merit.
From reading the rest of the issue discussion posted in OP, it seems to be an issue with the particular version of Docker bundled in 6.10.3, and doesn't actually have anything to do with the availability of cgroup2.
Not sure why this is a point of contention. I simply noted his recommendation and reported my findings.