To what are you replying to really? Does it say anywhere in the original article that the new conference is about the reduction of coal use but not mining? I haven't found any indications of that; instead, I see mentions that they want to reduce overall "coal dependency" and "coal extraction":
transitioning away from fossil fuel extraction
oil, gas, and coal extraction
global effort to phase out coal
https://fossilfueltreaty.org/first-international-conference
I think such a trivial thought has come to the organizers of this conference and it's well addressed.