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
Sync for Reddit is a popular reddit 3rd party app. Since Reddit is gonna kill them, the developer decided to do Sync for Lemmy instead, but is gonna take him 3 to 4 weeks to get some kind of beta.