Deepslate does not generate below Y=0 in Badlands or Wooded Badlands Biomes

The Bug

The deepslate that's supposed to replace stone below Y=0 doesn't work if it's under a Wooded Badlands biome or badlands

Reproduce

• Create a world
• Do /locatebiome badlands
• Go below Y = 0

Observed Result

Stone generated

Expected Result

Deepslate would generate