I agree with Yorkierose.
Also another way to check topline is when the dog is wet. Ane when the head is down eating you should see a straight line.
I've had Yorkies for 30+ years but have only been showing 1 year this month.
have learned a few expensive($$$$$) lessons. Most top show breeders will not sell show pup until at least 6 mos. old and then usually only to a show home.
Your girl looks to have a very pretty face.