Indeed. The US Army National Guard and the Air National Guard are de facto elements of the federal government.
Militia (s) are either organized or unorganized elements of the people and or the states. The ARNG is nothing like that.
The fact that the the ARNG is capable of being activated to federal status/duty by the NCA ought to give folks pause when considering the false idea that it is a state organization.
Of course the idea that the ARNG is some 384 years old is ridiculous- the big important fact is that states have lost their capability to use force of and on their own account. The Dick Act made it possible to activate and move state militias ( as they were independent prior to this act) at the whim of the federal govt.
To the best of my knowledge the NG is a reserve for the Federal army, and in no way a militia. And as a history teacher I am pretty sensitive to history being abused.