I should be clear that I am talking about expectations of time, not expectations of effort or competance.
I work 40 hours a week, no more. (If paid overtime were a thing at my company, I might do more. But it's not.) I bust my ass during those 40. Sometimes I work on personal side projects in my free time for fun or to sharpen my skills.
If you want to be promoted, I'd rather you work harder and smarter, not more. If a coworker of mine got promoted because they worked weekends, I would actually be pretty frustrated at them.