Do aliens exist? How did they have a connection to Egyptians

Were they responsible for the Pyramids built in Egypt? What are some evidences that suggest this is true?

The existence of extraterrestrial life is possible, but as of yet lacks evidence.

There isn't really evidence connecting extraterrestrial life with the Ancient Egyptians either. There are just things which kind, sort of look like evidence if you neglect to consider other evidence (and even then it's mostly an argument from personal incredulity/ignorance). Their pyramids have a definite, progressive architectural lineage that gets grander and more complex over time, with the apparent ancestor being the much more humble mastaba tomb.

Popular culture likes to exaggerate certain aspects. The block size of the Great Pyramid gets larger and larger with retellings. Crude images become "obvious" spacemen. And the usual refrain is, "I don't know how this worked (and perhaps refuse to find out), therefore ANCIENT ALIENS!" It's intellectually lazy and fervently dishonest, but there's money to be made in doing so.

I believe that there is an extremely strong chance that life exists elsewhere in the whole universe. However, I do not believe that there are, or were any possibilities that "aliens" helped Egyptians build pyramids. Even if aliens did build pyramids, they would have left a piece of their presence on Earth. Also, there is overwhelming evidence that pyramids were built by people, just like your average construction worker.

We haven't seen any evidence aliens exist and there are good reasons to suspect that we are the only intelligent, technological civilisation in the universe (namely that any such civilisation would eventually spread all over the universe and alter it in such a way that it'd be obvious they exist).

We know that the ancient Egyptians were quite capable of building the pyramids on their own and have no evidence that aliens were involved or have ever even visited Earth.