Yes. Normal amounts of noise in the middle of the night are perfectly legal and for some, normal. I work 3rd shift full-time so two nights a week I'm at my apartment above people, awake, and walking around. It's just how I operate due to my working hours. I don't make excess noise, I don't play my TV super loud, or blast music etc... (in otherwords, I try to remain empathetic and understanding that others are trying to exist/sleep around me) but I am up and walking around at 11pm, 12a, 1a, all the way to around 5 or 6am. My TV is on, I do talk on the phone or to my roomates sometimes. That's my life. It's no different than when I go to sleep, during the day from around 6a-ish to around 3p-ish. Other people talk, or walk around, do chores, or watch TV, play music or whatever they do, (typically much louder too because that's more acceptable), but I just have to accept that people have a different schedule than I do. Some people get home from work at 11pm at night, and prefer to be awake at night AFTER they get off, just like you do. That's extremely normal.
I'm not saying that you shouldn't maybe try to reach out to see if a compromise could be made, or that you shouldn't call the police/property manager if there is actually loud or excessive noise after quiet hours. What I am saying is that maybe you should have some empathy and understanding for someone who might operate a bit different than you do. Sometimes in life, people operate different to how we do, and we have to just suck it up and learn to live with it.