In the 2024 Roadmap for WoW Classic, Blizzard announced that Self-Found Mode would be releasing early next year, possibly in February 2024. This new game mode will likely launch after Phase 2 for Season of Discovery and after Cataclysm Classic Beta is underway.
We had the opportunity to interview Blizzard Developers at Blizzcon and this is what they shared about What exactly is Hardcore Self Found --
In the announcement post for the 2024 Roadmap, Holly Longdale specifically mentioned that the Self Found game mode would be launching in February of next year --