Do aliens have UFO

Answer 1

The acronym "UFO" stands for "Unidentified Flying Object", not "Alien Spacecraft". UFO means you don't know what it is, which means you don't know it to be an alien spacecraft!

So far, in real life, no aliens are known and proven to have come to Earth. No UFO has ever turned out to be an alien spacecraft.

It's fun to pretend about such things, but taking it any further than the actual facts is like a carpenter driving nails into air-- not a lot actually gets done!