Hi, it seems, that there is no Download-Link for this great Mod as Datapack with the latest fixes in 2.4.3? Is this a bug or will it come later?

All worldgen changes in 2.4.3 required the Lithostitched library mod, there's no way to port that into the datapack. The datapack version will still be receiving future worldgen changes that don't rely on it, though.