The business consensus for the last 3 decades was to outsource the supply chain to the cheapest bidder. That the cheapest bidder had no environmental regulations was an ignored outcome. That the cheapest bidders were all closely related and existed within a new competing network of suppliers was likewise ignored.
I suspect the lack of direction that's been apparent for the last ~8 years is partially due to a general view that one or more of free-trade, free-enterprise, environmental protection, or national security/international posture needs to change.
Not quite though. The US's strategy has been for someone else to do the mining. That strategy works pretty well when it's two dozen other countries in competition with one another, because then you're not reliant on any one of them and there is no single point of failure.
The failure is in failing to prevent it from all being consolidated into a single authoritarian country.
The interesting fact about competition on the world market is that the easiest way to compete is by making the private and public sector work together. People complain about China subsidizing exports for unsustainable prices, sometimes below the cost of production, however this is only possible because the government is ensuring there is enough stability in the country for those companies to continue to exist and because the government is actively supporting these growing industries even if there is some inefficiency.
DRC basically has none of that, if anything the private sector may have an unreasonable degree of control over the government but the government has no control over the private sector.
The US has been pushing all its externalities onto 3rd world countries for decades so it can enjoy a high standard of living while pretending that it doesn't have an environmental cost. China & Africa have endured some very dodgy waterways and extremely questionable air so that America gets iPhones and other electronic gizmos.
Several American administrations and a couple of powerful political lobby groups have been everything short of openly hostile to the mining industry. Although the worst of the ire was directed at coal, the thumbscrew tightening approach to regulation affected everyone.
China's strategy is to get a lock on rare earth production. The US's strategy has been for someone else to have a lock on rare earth production. The States has not been a prime destination for mining investment in the last 30 years, and their market for consumption hasn't been growing all that much. The only thing in their favour is that with the rule of law the mine probably won't be nationalised.
China isn't acting unilaterally here. It is illegal in the US to do what China does to get ahead.