Yes or No?
I'm obsessed with physics and astronomy and there's a well known theory that there's either A LOT of life or it's EXTREMELY rare.
I tend to believe there is a lot of different life forms across the universe, but that doesn't mean they are all intelligent civilization founders and have access to advanced technology like humans.
We may never find out even if an advanced civilization is relatively near by to us (in light years) because of how insanely difficult it is to travel to other planets in our own galaxy let alone to the something trillion more that exist
If there are in fact alien life being investigated by the US government, they are either from an extremely advanced and technological civilization that we as humans could never even comprehend or are travelling from different dimensions (surprisingly, the existence for other dimensions is very plausible in science, it's just how to set that in motion which feels impossible)