Hello,
None of the new minerals have been generated in my world. Perhaps I have to modify the world.toml file like this :
#World generation settings for Mekanism. This config is not synced from server to client
[world_generation]
#Allows chunks to retrogen Mekanism ore blocks.
enableRegeneration = true
#Change this value to cause Mekanism to regen its ore in all loaded chunks.
#Range: > 0
userWorldGenVersion = 1
I'm on a server with a few friends, also another question : should I modify the file on client and server side or server side would be enough ?

In advance thank you for your response, cordially,

Ok it's good now. Thanks,