Your faith in the power of legislation to repair the decades of decline in US military industrial complex supply chain capacity is charming, but not based on anything more than blind US exceptionalist hubris.
The US military industrial complex is a hollow man - headless chicken lacking vital supply chain support structures due to decades of the systemic neoliberal decimation/global outsourcing of US industrial productive capacity.
It is not only refined rare earths supply chains where the US military industrial complex is deficient, but in a plethora of other strategic supply chains which China now dominates.
There is no guarantee future administrations will continue with the massive taxpayer subsidies being applied currently to stimulate US refined rare earths supply...so you cannot reasonably be certain the process will succeed as it will not be completed under the current administration.