Can you present 100% cast-iron evidence that they did come from the Asian continent and were not planted by the CIA?
Really the CIA? Are you HIGH?
Google them.
You will find they used to be known as the giant Japanese hornet then later Asian when it was found that they habituated all over South East Asia. This has been known for decades.
Many experts reckon they were stowaway in naval vessels and freighters to the west. Given the amount of trips the US and Canadian navy make to Asia and the amount of goods shipped from Asia to the America's this is plausible.
But sure it was the CIA just so in 2020 they could point their racist fingers and have their mouthpiece and fellow racist news Corp CNN report it.
Oh and do your research. Literally every news agency reporting them mentions the name Giant Asian Hornet.
All hornets originated in Asia by the by. See above to why they spread throughout the world. Long before the CIA where even a thing too.