I think it's one of those things where it works both ways. Ancient Egyptian mythology and religion says that at some point, the god Ra ruled over Egypt as both pharaoh (with a mortal body) and god of the sun. Later down the line, another story tells of how Set and Osiris were both in power as pharaohs and gods (Set ruled the North while Osiris ruled the South) before Set killed Osiris and usurped both ends of the country.

To answer your question specifically, the pharaohs weren't considered to be the gods themselves, but rather they were considered 'reincarnations' of a god's aspect. For example, Tutankhamun's name literally means 'Living Image of Amun', and he was thought to be the reincarnation of Ra, but at the same time, he was considered to be a seperate entity from both Ra and Amun, if that makes sense.

I don't know if pharaohs considered themselves gods, but Osiris' death allowed him to become god of the afterlife so perhaps pharaohs thought something like this would happen to them after death? |

Edit: after reading into this some more, I remembered that a common thing in hieroglyphics was to show pharaohs actually conversing and interacting with gods physically, and compared to normal people, they were depicted as very large and tall.