Too much sleep?

My girl’s just turned 14 weeks and she’s been sleeping a lot ever since 11 weeks. She sleeps very well through the night... and day as well. Her bedtime’s around 10pm-6am and she’d stay awake for an hour or two before having another long 5-6 hour sleep.

This goes on repeat. She’ll stay up for another hour or two before asking for another long sleep. On average, she stays awake for about 6 hours a day. Is there such thing as too much sleep? She’s the happiest when she’s awake so i don’t think she’s sleeping off her pain.