Egyptian cultures never were much influential except for territories once part of its dominion (Nubia, Syria/Palestine) : it was too much associated with Egypt to became used by others cultures. While the scientific achievments were widely used and acknowledged by Greeks the artistic, architectural, etc features were too closely related with egyptian rites or cults, something of an exceptionnalism, to be widely taken by Rome.
OTL, you had romans buildings small pyramids, importating or buildings obelisks after Agustean conquesy, not unlike Napoléon's expedition provoqued the égyptomanie.
Furthermore, when Rome became a great power in Mediterranea, Egyptian culture (at least dominant one) wasn't the pharaonic one, but an hellenistic egyptian culture (due to a process existing since the V°).
The dominant culture, in all regards, since the birth of Rome was the hellenistic one, critically in Italy while, again, pharaonic culture was at best reduced to popular egyptian society.
It would be like asking if US didn't used more Inca features rather than European.