There are a few quests that appear on the Wuthering Waves achievement screen that are nowhere to be found no matter how long you search for them. One of them is Lores Beyond the Ranges.
Wuthering Waves – Lores Beyond the Ranges – Side quest walkthrough
While you can find a recon mission of the same name in Mt. Firmament, completing it will not unlock the achievement as the mission you're looking for is something different and apparently impossible to find, at least for now.
The Lores Beyond the Ranges quest has not been found in Wuthering Waves. Players are divided on whether it will be added in a future release or if it will become a daily quest that no one has found yet.
Players in a Reddit thread have been arguing about the quest since the version 1.1 update released on June 28, but no one has been able to find it. It's not the first time a quest has appeared on the achievements screen but not yet been in the game, or it's just plain confusing.