I liked the Silo series too. Hoping to watch the TV adaptation at some point.

Some of my favourites:
Murderbot series by Martha Wells
Imperial Radch series (Ancillary Justice/Sword/Mercy) by Ann Leckie
Vorkosigan Saga by Lois McMaster Bujold
Dogs of War duology by Adrian Tchaikovsky
The Expanse series by James S A Corey
Monk & Robot series by Becky Chambers

I’ve not read the Xeelee series so can’t say if there’s any similarities, but they are all excellent sci-fi series and well worth your time.