I think it’s pretty normal for that age to not need such an early bedtime. My ds is 10 and he can easily wake the next morning and function if he went to bed between 9-9:30 the night before. We typically put the kids to bed, pray with them, tuck them in, etc. by 8:30, and tell them they can read until 9:00. If they want to fall asleep sooner, they certainly can.
This might be an obedience issue for you, if you’ve told her that extra bedtime hugs are a no-no or if you feel like she’s finding excuses to get up. But honestly, as Bookworm said, if you’ve gotta pee, you’ve gotta pee. My children take water to bed with them; that keeps anyone from having to get up for a drink. We keep the lights low starting around 7:30, so it signals their bodies and minds to start winding down. We give them plenty of cuddles and hugs before bed so there’s no need to get up again for extras, although I have a hard time denying a child who really wants an extra hug…I mean, how long is that going to last, right? White noise is a LIFESAVER for us too. All of us use white noise, and none of us can sleep without it. Maybe she needs that?
Hormones and growing can affect a sleep schedule too. There are times in life when we legitimately need more sleep than others. Even as an adult I experience this. Some nights I’ll sleep a solid 10 hours, and some nights getting in 6 is all I can do simply because my body either woke me earlier than usual or I had difficulty falling asleep the night before. I am not a fan of alarm clocks, and rarely use one for myself. My kids have never been woken by an alarm clock. I figure if they sleep until 9:30 a.m. (which ds did this morning even though he was lights out at 8:30 last night!) their bodies must have needed it, and we adjust the day accordingly. I have the freedom to do this because I have just the 2 kids, and we aren’t super busy people. So ds got 13 hours of sleep last night, and tonight he might get 10.
Have you explored all other options:
Is she frightened of something? My ds saw a documentary once that freaked him out and had trouble going to sleep because his mind wouldn’t shut those images out for months.
Is she hungry? Maybe a small, protein-rich snack before bed would help settle her down.
Would a hot bath help? Or some essential oils?
Our dd has a hard time falling asleep if she doesn’t have enough weight on her body. So she sleeps with a heavy quilt doubled up on her. Could it be something like that that you’ve never thought of?
Hearing household sounds would keep my children awake. So white noise is great for covering those noises up. Have you tried that?
It could be a million different things, or it could just be your dd’s internal clock. Don’t worry! Her body will adjust so that she gets the sleep she needs!