just... doesn't work. i installed tectonic for forge and it didn't generate the modded terrain. i tried the datapack but that also didn't work.

How far have you explored in your world? Also are you sure you didn't just be a windswept region? Windswept regions can often look like og minecraft generation

Make sure the datapack is installed in your world. Other than that I have no clue

Not enough info to replicate, if this still impacts you then please create a new issue.