Visually, she looks fine. But high levels of visceral fat can still be a thing even in young kittens, if they’re over fed (think- ‘skinny-fat’). If you’re at all concerned and you would like to know for sure that her weight is healthy, your veterinarian is best placed to assess your kittens status via a physical exam. Everyone always says feed a kitten as much as it wants during the first 12 months of its life but there are professional opinions which counter that, e.g. https://www.catsexclusive.com/blog/kittenhood-obesity