Depends really, much like humans they have different weights and body types but her weight is fine for an adult and if she is gaining weight I wouldn't worry about it, shr will soon fill out.
Hi there, agree with Neil. Her weight isn't too bad right now but another 50-75 would be good but another 100 over a longer period of time would be fine. Her legs did not develop a lot of muscle so her weight will be a bit less than other dragons with a more hefty build. Don't worry about trying to put weight on too fast, that can do more damage than good. Slow + steady is the way. Some people still think a fat dragon is healthy but these become couch potatoes and develop the same health problems that we do, including joint + internal organ damage.