Edit:
Official Lemmy Community:
https://lemmy.world/c/syncforlemmy
This should open the community in your instance
Looks like the Boost for Reddit Dev just reserved a Lemmy Community…No official announcement yet.
Proof: https://old.reddit.com/r/BoostForReddit/comments/14ehiqs/_/jouvuok/
Direct Link to the Community: https://lemmy.world/c/boostforlemmy
This seems to be the official magazine: https://lemmy.world/c/syncforlemmy
Confirmed by LJDawson: https://www.reddit.com/r/SyncforLemmy/comments/14ee1ul/sync_for_lemmy_is_happening/joui3ej/