Is it possible to force mobs to spawn on bedrock? I have tried different configurations but nothing seems to want to spawn mobs on bedrock. Here is what I am currently trying:

in the spawn.json:
{
"dimension": 4,
"block": "minecraft:bedrock",
"result": "allow",
"hostile": true
}

in the potentialspawn.json:

{
"dimension": 4,
"block": "minecraft:bedrock",
"result": "allow",
"mob": ["abyssalcraft.shadowbeast", "abyssalcraft.shadowcreature", "abyssalcraft.shadowmonster"]
  }

Any ideas on how to allow mobs to spawn on bedrock?

So far I am digging the flexibility with Incontrol... Thank you

In case anyone is interested, I found a workaround. Using the Bedrock B Gone mod, I am able to replace the Minecraft Bedrock block with a "custom" Bedrock block. Mobs do spawn on this blocks so I can now play around with this. Thanks