posspack/config/defaultoptions/extra/config/alexscaves_biome_generation/magnetic_caves.json

{
  "disabled_completely": false,
  "distance_from_spawn": 400,
  "alexscaves_rarity_offset": 0,
  "continentalness": [
    0.6,
    1.0
  ],
  "depth": [
    0.2,
    1.0
  ],
  "dimensions": [
    "minecraft:overworld"
  ]
}