Versions:
Minecraft 1.16.3 Forge 1.16.3-34.1.25 rftoolsbase-1.16-2.0.6

MinecraftServer/world/serverconfig/rftoolsbase-server.toml

#Settings for the infusing system [infuser] #Maximum RF storage that the infuser can hold #Range: > 0 infuserMaxRF = 60000 #RF per tick that the infuser can receive #Range: > 0 infuserRFPerTick = 600 #Maximum amount of dimensional shards before a machine is fully infused #Range: > 1 maxInfuse = 256 #Amount of RF used per tick while infusing #Range: > 0 usePerTick = 600 #Dimensional shard ore generation [worldgen] #Overworld [worldgen.nether] #Number of times to try generate the ore (set to 0 to disable) #Range: 0 ~ 256 oreChances = 12 #Max height #Range: 0 ~ 256 oreMax = 126 #Max size of veins #Range: 1 ~ 256 oreVeinsize = 16 #Min height #Range: 0 ~ 256 oreMin = 2 #Overworld [worldgen.overworld] #Number of times to try generate the ore (set to 0 to disable) #Range: 0 ~ 256 oreChances = 2 #Max height #Range: 0 ~ 256 oreMax = 60 #Max size of veins #Range: 1 ~ 256 oreVeinsize = 7 #Min height #Range: 0 ~ 256 oreMin = 2

The above file is created by RFTools base.

I have deleted my nether dimension Multiple times and regenerated it, and even setup an X-Ray in an attempt to confirm that the dimensional shard ore was generating.

I also moved the above config file to MinecraftServer/configs to see if that would help.

This ore will not generate anywhere. Overworld or Nether.

Edit: Apologies for the Code formatting above. Github breaks it.

Yes, this is not implemented yet in 1.16. Always forget to do this. Thanks for reminding me :-)

Will be fixed next release