I had CP when I was 5yo and it left 5 large, deep 'craters' on my face. The worst is on the side of my nose. I think it might be to do with skin type? Mine are the largest and most pitted scars of anyone I've met IRL. When my own dds had chickenpox and I was worried they'd scar as I did, but they were fortunate and were only left with a couple of small scars on their faces and white blemishes on their bodies.
My scars were massive when I was little but my DM downplayed it and I think this is very important for you to do, OP. You say that your little girl has no idea - keep it that way. Don't give her a complex about it. In the grand scheme of things, it's small, although I do understand where you're coming from. My mum would always say to me things like 'you'll grow into them' - which I have, really. As my body has grown, the craters have flattened out to a degree and are skin-coloured. My skull has obviously grown and the skin has stretched and for your dd, that will reverse a lot of the damage you see now in her very young, very delicate skin. Her skin texture will change as she grows, too, and this will be good for the scars healing.
I can still feel a dent in my nose (am 33yo now) but it really isn't an issue. In fact, those scars are a part of me and I would not change them. I know I could have sub-dermal fillers to plump them, but I don't want to. FWIW, the scars have never affected friendships or attracting boyfriends.
With reference to what you said about your dd having perfect skin before - you didn't love her more before because she had perfect skin, did you? You don't love her less now she isn't 'perfect', do you? Of course, the answer to both is 'no', so just keep loving her and let the fear and panic wash over you. She is okay and time will heal her skin. Your dd will be a teenager one day anyway, probably with pimples which might also leave their mark on her skin (I have small pitted scars from teenage acne on my temples) and you will love her just as much. Just try to relax about her scars, as she is coming close to an age where she will pick I on your anxiety about her appearance.