I do not think the Egyptians were visited by the aliens in principle because no one has yet proven that the aliens exist and secondly because some tangible evidence or would not have been found and has not been so at least to this day.

The anthropomorphic Gods, with the head of a jackal or a lion, bird wings e, t, c, can be simply a symbolic aspect, they are also elements of the environment in this case of the Egyptians and can create a thousand anthropomorphic compositions, I do not see nothing special about it other than to impress the plebs and make it clear that the Gods have superhuman qualities.

If I already have trouble praying to a Christian image to one with a jackal's head, it is because I put it to birth.