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You're probably thinking of The Baroque Cycle, which is pre-Victorian.

Not OP but I think they are talking about Diamond Age. It's set in futuristic Victorian society.

"series" definitely suggests they meant Baroque Cycle since it is 3 books, even if "Victorian" misses the mark by a few hundred years.

Diamond Age is a single book, and one of the "phyles" (cultures / pseudo nation states) is called the Neo-Victorians