First when you say industrial i say "what?" because those concepts simply don't exist yet, no engines or production lines as far as the GM's have told me.

However playing a bit of devils advocate.

Grevious that isn't that large of an issue, areas like China had dry coal that allowed large scale production as early as 1200, by the 1490's the Chinese production was indeed substantial. However these conditions usually require a distance from the ocean and large near surface deposits of coal since there is no tech to defeat groundwater yet.

Touching on that, given the long history of the planet metallurgy has to be rather new, since the rather short history in comparison of it in Europe lead to the silver crisis of 1465 where there was simply no more silver that could be taken from all the existing mines as pumping technology did not exist. Copper ran into the same issue, iron of course was more mined but several factors including the relative newness of iron working in the grand history made that a smaller issue. So we may be in huge shat.

Or we can just use fantasy magic! Your choice.