This really should have happened shortly after the war began.

Then again discussions may have taken place, and the geopolitical consideration were (and are) massively complex. The level of aid that other countries, especially the US, were providing was a delicate balance especially in the beginning. Providing a resource of highly strategic usefulness under the fig leaf of it coming from a private US corp may have been deemed necessary. But at some point it’s unreasonable of the DoD not to foot the bill. After many many $Billions of lethal support the fig leaf has been torn off.