Puppy not peeing as much as I expected?

I just got my female yellow lab puppy on Friday, she’s 16 weeks now. Took her to the vet and she was an angel, everyone adored her. No issues besides an ear infection we’re working on clearing up.

She’s doing amazing with crate training and potty training. We just got into a real schedule this week since my husband is at work and my oldest is at school, so it’s mainly me working with her. She’s so smart and truly just a dream of a puppy. Loves her kennel, sleeps through the night, good with “sit” and working on recall.

My only concern (and maybe I should’ve brought this up to the vet, but I had two of my kids with me and well… mom brain lol) is that she really doesn’t seem to pee that much? She’s very good at holding it. She held it the entire 5 hour drive home from getting her, holds it overnight no problem, I stay home but if I have to take the kids to an appointment I know she’s going to be fine in her kennel. I give her water with all her meals and then mid morning and mid evening I’ll give her some extra. Everything I’m seeing says puppies her age pee around 6-10 times per day, but she’s at maybe 4 times? They are pretty long pees and she isn’t struggling to go or show any signs of discomfort or anything. She also only poops once a day, sometimes twice. Not sure if this is worth bringing up since she doesn’t have any other concerns, or if she just has a bladder of steel?

Today- she peed around 6am, then again at 10:30am (pooped too) and it’s now 4:30pm and I’ve taken her out maybe 3 times since and she still hasn’t gone.

Thanks!