Something else that also has space Romans is Ultima by Stephen Baxter. Much of it takes place in an alternate timeline where the Roman empire still exists in the 2220s.

There is one: https://www.tuxedocomputers.com/en/TUXEDO-Sirius-16-Gen1.tuxedo#

Link to the original on twitter: https://twitter.com/Murace4/status/1715034874934108161