This looks like industrial policy masquerading as defense in order to clear the board for domestic manufacturers just as the Pentagon starts handing out contracts to politically connected players.
Case in point: Unusual Machines just secured a massive Army contract for drone motors. Their advisor and major shareholder? Donald Trump Jr. [0]. Banning the import of foreign "critical components" conveniently forces the market into their funnel.
[0] https://www.ft.com/content/4cedc140-4a02-4ab6-9f78-93dd8c51a...