Igniters aren't configurable [1.9.0, Fabric on MC 1.20.1]
The "Igniters" tab does not let change, nor add anything. When I tried detonating the coal ore in Survival, with a gold and iron picaxe, nothing happened.
Also, I thought that perhaps it would be cool if explosions and fire could detonate coal as well; so it becomes more dangerous with a vein of coal ores. Furthermore, as one other person said, it would be nice if the coal block could also explode, but with more range.
That said, I really like this mods premise. I hope to see it develope more. Thank you for your work!