Every tomb in rome had was influenced by cultures throughout Roman empire. Most of Rome's gods were foreign. On the other hand Egypt had limited influence. Why?
Depends on how one defines limited. Compared to say, the Gauls or the Germans (each of whom invaded ROme, one before empire, one at height of), the Egyptian influence is easier to see. Not as great as the Greeks, but not to be sneezed at.
In truth, the Romans were fascinated by Egypt as much as moderns are. One major (ancient) landmark in Rome today is the tomb of Cestius, built in the shape of a pyramid. Obelisks were taken at great expense from Egypt to Rome, and later on made in Rome from local material and graced with faux hieroglyphics.
Roman wall painting sees elements of Egyptian painting.
Then there are the gods. Evidence of the Isis cult has been traced as the second century BC, and that on the sacred Capitoline Hill. A few emperors took a strong dislike of Egyptian gods - Tiberius had their images tossed into the Tiber (and when he died, the Roman mob wanted to throw him into the Tiber) - but others embraced them. Caligula was a devote of god Isis, along with her companion Hathor (who were much like Juno and Venus). So were the Flavian emperors (Vespasian, Titus, Domitian). They were not alone.
Rome also hostedthe Temple of Isis and Serapis, (Iseum Campense ) built on the Campus Martius under Augustus.
One can understand the attraction. Egypt had thrived for thousands of years, they must have been doing something right. If their gods had anything to do with the country's longevity, well, come on in.
So it's there, just not quite as obvious as with Greece.