I was looking at the mining drill tooltip and realized where it says "Expected Resources" doesnt take into account mining productivity level or resource drain.
The mod adds a new tool to the toolbar called the "Resource Analyzer" and when clicking on a mining drill with it shows how many resources it will actually get factoring in mining prod and resource drain if its a big mining drill.

This is really my first actual mod (at least that im releasing publicly) so expect some jank
for instance, dont bother dragging it over an area, it doesnt take multiple drills into account and I think it just displays the highest resource amount from any of the drills.