Suggestion for 1.18 version of the mod to have new option to create layered ore veins generation.
Basiclly this is the same as ore veins in vanilla minecraft, execpt it can be actually conrolled and customized.

As for OSV I suggest that feature to have that config options:

• Stone block: (block id)
  Ore block: (block id)
  Chance: (value) (Chance with what percent stone block can be replaced)
  Raw ore: (block id)
  Chance: (value) (Chance with what percent stone block can be replaced)
  Maximum Y: (value)
  Minimum Y: (value)
  Biome whitelist: [list]