The chip supply chain is a lot shorter and more concentrated than the mining supply chain. If you're thinking of "rare earth" metals in particular, it's probably better to focus on the refining rather than digging out of the ground. Between South America, West Africa, and Australia there are lots of mines for most of the metals, but only refining in China (because it has been highly subsidized by both monetary and regulatory means since the 90s). Silicon refining is similarly bottlenecked even though the high quality input material is mostly US sand.
We HAVE have to focus on the rare earth part or you are basically just giving China the whole thing as they control more then 90% of refinement (and almost all of mining)