The US military banned DJI in 2017, and sanctioned them in 2020: Is a DJI drone ban coming for drone enthusiasts? Chinese made drones facing increasingly intense scrutiny in Congress
any drones with Chinese-made components.
The US military believes that DJI and other Chinese drone manufacturers are backed by the Chinese government even when publicly disclosed; therefore, they think that the drones have backdoors allowing for spying or other nefarious state acts.