As long as your not breeding them right now that weight sounds good. If they have nice thick tails and are happy leave them and not worry about their weight.
It definitely depends on the proportions of the gecko. Some geckos just have a smaller stature and could easily max out at 48g. If you have a pic of her feel free to post it.
She's looking very good. The tail could use some more fattening up, but as you said, you just got her eating again and that's understandable. I think she looks good, though, not deathly skinny or unhealthy looking. Very BEAUTIFUL too!!!!! :smitten: