How many hours does your toddler sleep at night?

My son goes to bed at 7:30pm and at one point was sleeping until 7/7:30 and waking up happy, but he always goes back to early waking around 5:30/6 and wakes up crying and crabby. I don’t want to force him to stay in bed if he got all the sleep he needs, but he doesn’t seem happy when he wakes up early. Just trying to understand what is “normal” at this age.