Sewer systems existed before Victorian times, or came in during them so they'd likely be in most cultures.

For electricity it generally took a good few decades for it to become viable for use. I wouldn't think full fridges yet, but think I've houses. Think very simple electronic lights. They still need a lot of generation. Batteries wouldn't exist yet. Cars likely wouldn't.

In terms of factories I think industrial revolution. So you've got the massive cotton mills. Huge food factories. Some of it would be automated by machine but needs huge manpower. There might be early conveyer belts, but they would be driven by clockwork. One book I read once actually had clockwork animals so that might be something to consider.