it's not the WHEN that's important at all... it's the HOURS.
Infants need 12-16 hours of sleep a night
Toddlers need apx 12-14
Elementary aged kids (prepuberty) need 10-12
You'll find the WHENs vary very regionally. In southern Italy, bedtime is typically 1AM. Why? Because everyone gets up around 7ish (for work and school that starts at 9) then EVERYONE GOES HOME and naps from about 1pm-6pm.(or 2-5) Kids go back to school, adults go back to work. DINNER is at 10pm. Adults are getting 8 hours, kids are getting their 12+ hours.
In the US dinner USED to be "universally" at 8pm (like it's "universally" at 6pm NOW). Bedtime was 9-10. School started at 10 and was out at 2pm. Then women entered the workforce (wwii) and everything changed. (school days got earlier and longer). School days have CONTINUED getting longer in conjunction with WORK hours. Remember 9-5? Who works 9-5 anymore??? Almost no one. Instead, it's drop the kids off at daycare at 630, to be at work by 730. Schools are starting between 7am & 8am and going to 4pm.
The "8pm" bedtime was from a holdover (our generation) where school started between 830 & 900 am.
Nowadays MOST parents are starting to put their kids to bed at SEVEN. Why??? Because kids need 12 hours of sleep, and they have to be in school by 8, which means up at 7... if they're NOT ALREADY up at 6 for daycare.
Your daughter is getting the HOURS she needs. If you need her on a different schedule for your own life/needs... it'll take a bit of work, but you can switch her (be prepared for some exhausting cranky weeks). If NOT... you have 4-5 more YEARS before you have to worry about an 8pm bedtime.