My dd's voice sounds very babyish

[Dancergirl]

I noticed at a school assembly a while ago that my dd's voice sounds v babyish compared to her peers. She is nearly 10 in Year 5. Most of the girls in her class speak with nice, clear quite grown up sounding voices but dd's sounds like a much younger child.

Is this something that will just develop naturally or would a SALT help?

What about her pronunciation, vocabulary and phrasing? Are they age-appropriate? Is it the pitch?
Does it bother her at all?

Her vocubulary is excellent, it's just about the pitch really. Listening to her she sounds like a 5/6 year old child.

It doesn't bother her per se but she's had a few problems fitting in at school lately and some of the girls think she's babyish because she isn't into the latest pop music/celebrities etc. She's also teased because she has a gap in her teeth. I don't want this to be something else she can be teased about.