We don't know for sure. But Q reminds us to read the Bible and have faith in God, not in ETs.
And by the way, all those "incarnated ET" twitter accounts are 100% comped.
Seems more likely that the whole ET narrative was a psy-op to distract us from basic, ancient divine truths: that there is a God, that there are angels and demons, and that we are in a spiritual battle for our souls. If you worked for satan (like IncarnatedET does) you would love nothing more than to distract the people from this spiritual battle to enable satan to claim more souls.