Need to reword and change your question to get this answer:
it is not how much she should weigh, but more importantly, what is her rate of weight gain, and what is her BCS= Body Condition Score.
Every pet is different. Even within the same breed, differences in bone structure dictate differences in proper weight.
So, if she is steadily increasing weight and has a good BCS per your vet, then everything is fine.
I would say there is no standardized answer to your question.
Hope that helps
Here is a Q&A from some other owner's I thought you may find helpful.