I have posted to the !evs@lemmy.world community from my lemmy.ml account. However my post does not appear on lemmy.world/c/evs but it does appear on lemmy.ml/c/evs@lemmy.world .
Update
https://github.com/LemmyNet/lemmy/issues/4282#issuecomment-1859947661
Another update
It shows up on my instance.