Military technology is classified and anyone with true knowledge of military application of AI in any country would be committing treason by divulging this information publicly. Therefore we may never truly know. However, there are public sources of information on various policy approaches to development of lethal autonomous weapons .
"U.S. policy does not prohibit the development or employment of LAWS.
Although the United States does not currently have LAWS in its inventory, some senior military and defense leaders
have stated that the United States may be compelled to develop LAWS in the future if U.S. competitors choose to do so. At the same time, a growing number of states and
nongovernmental organizations are appealing to the international community for regulation of or a ban on LAWS due to ethical concerns. " More here: https://crsreports.congress.gov/product/pdf/IF/IF11150
"China’s apparent diplomatic commitment to limit the use of “fully autonomous lethal weapons systems” is unlikely to stop Beijing from building its own." https://www.cnas.org/publications/commentary/chinas-strategic-ambiguity-and-shifting-approach-to-lethal-autonomous-weapons-systems-1#:~:text=On%20April%2013%2C%20China's%20delegation,According%20to%20the%20aptly%20named
For current use of AI in the military, see this PBS documentary: https://www.pbs.org/newshour/show/how-militaries-are-using-artificial-intelligence-on-and-off-the-battlefield#:~:text=But%20one%20of%20the%20things,enemy%20faster%20and%20more%20accurately.