Sounds pretty normal to me

Lola looks to be a very good weight for her age in her photos - she's not as lanky as many pups

And she will continue to fill out as she ages, but you're way past the age of visible growth spurts.
No idea how tall she is, but at around 25Kg, she is right at the correct weight according to the boxer standard for a bitch of around 22". I suspect she's a little taller than that, but she *is* still a puppy and has another year or two filling out to do. Chances are, you're going to see another 4-5Kg (around 10lb) sneak on there before she's mature - and if it's indeed that much, that will put her above the weight range indicated by the standard. But it will be very gradual, and you probably won't notice (till she hits the scales, that is

).
www.boxerworld.com/standards