She was laid to rest beside Anthony in Egypt by Octavian’s people. To take them back to Rome would have been a time consuming and stinky process.
If her tomb is found, it will be interesting to see if there are any other family members with her...like her son Caesarion. I hadn’t realized until researching him today that he was a teenager when he was killed by Octavian. For some reason I thought he was a small child. I guess I got that misinterpretation from the movie with Burton and Taylor.