Is it normal for my 6-month-old Golden Retriever be this sleepy?

Hi everyone! I have a 6-month-old female golden retriever puppy and I feel like she’s way more tired than other golden puppies I see online.

Her weekly routine looks like this:

• 3 walks a day, about 15 minutes each • Thursday: full day of daycare (no walk) • Sunday: 1 hour of puppy play group • Monday: 1 hour training class 

On regular days, when we’re not on walks, we’ll usually do an enrichment toy or something mentally stimulating.

But overall she seems tired a lot of the time. Her schedule is usually:

• Up for ~2 hours • Sleeps for 3–4 hours (in crate) • Repeat that twice during the day • Then she sleeps about 11 hours overnight (in crate) 

When she’s awake she seems normal and happy, but she’s pretty much done after a walk and a little enrichment and then wants to nap.

I always see people talking about how energetic golden puppies are, so it makes me wonder if this is normal.

• Is this a typical amount of sleep for a ~6-month-old puppy? • Do some goldens just naturally have a more laid-back temperament? Or should I expect her energy level to increase as she gets older?