Egyptian hieroglyphics already had alphabetic elements, and the canaanites borrowed those: https://en.wikipedia.org/wiki/Egyptian_hieroglyphs (“Egyptian hieroglyphs are the ultimate ancestor of the Phoenician alphabet, the first widely adopted phonetic writing system”).

Egyptian heiroglyphs were not an alphabet, even if they had alphabetic elements (in addition to pictographic ones). Scholars generally agree that proto-Sinaitic was the first alphabet, and all subsequent alphabets used today are either direct descendants or directly inspired by it. https://en.wikipedia.org/wiki/History_of_the_alphabet