I think part of it is human craft and something off world. Interstellar travel is unlikely but inter-dimensional is very likely. Are they demons, fallen angels, the watchers or unknown species or entities, who knows. If the abductions of humans is true then they can’t be friendly. After the first few they should know all they need to know about us physically.
I think we are being set up for a full disclosure by the government possibly because the phenomena is no longer willing to take part in the deception.
The more I study this the more convinced there is no “government” policy.
One example—the Atomic Energy Commission was in charge of the Trinity incident in 1945:
https://www.amazon.com/Trinity-Secret-Jacques-F-Vall%C3%A9e/dp/B09KDWDPZ1
Supposedly they kept the craft (and occupants) to themselves—other parts of the government did not have a “need to know”.
It looks like the Air Force has its secrets, the Navy has theirs etc.
The compartmentalization has gotten out of control.