DSs bedtime has always been roughly the same from when he was born. (Now 2y 3m).
He has dinner at 4:30, no later than 4:45 (they give him dinner at nursery around this time). We sit and eat, have a chat, take our time over it. He's done around 5:15-5:30, we take the plates to the kitchen, throw away any rubbish and rinse the plates. Then we gather all the toys scattered around and put them all in a pile in the middle of the room, and play while we put them away (like, "drive" the cars over to the shelf, pick out all the red things to put away first, whatever). By then it's about 5:45-6pm. Strip him off, change his nappy, get him in PJs, brush his teeth, this can take us to about 6:10-6:15. Then he comes up on the couch and lays while we put some Disney songs on. If it's a little earlier, we'll put three or four on, if it's later, just one. Then he has the same last two he watches every night (Hallalujah from Shrek, then Tale as Old as Time from Beauty and the Beast), says goodnight, and toddles into bed. I cover him over and say goodnight, and that's that. 6:30, in bed, done. Other than evenings I could count on one hand, it's never taken more than 5 minutes for him to go quiet, and even that's rare. Usually once his door's shut, I don't hear anything from him until next morning.
When I go to bed, I open his bedroom door, then in the morning whenever he wakes, he pads through into my room and stands smiling at me until I wake up. I usually hear him stirring, so I lay and peek at him for a minute, then "wake up" and he crawls into bed for 10 minutes before we actually get up. This can be anywhere from 6:30-7:30. Once in a blue moon it'll be 8am but that's rare.
He's had the odd nap on the odd day over the last few weeks, but none for a little while now, seems to have given them up for the time being. When he was napping, it was roughly 12:30-2pm.
I didn't find his naps made any difference to his nights.
Essentially, if he napped, it was because he was extra tired and needed to sleep.
I worry sometimes I put him down too early, but, as others have said, every kid is different.
He's had the odd night of being up later (been out an got home later or whatever), but I find if it gets any later than about 7pm he's a nightmare to get to sleep.
If LO wants to go to bed at 8/9/10pm, I don't really see an issue with that? If that's when she's happy to go down, and still get up at a reasonable time and be happy through the day...
If it ain't broke, don't fix it. Do what works for you and LO. Xx