Was she 200 grams before developing eggs or is that her weight with eggs?
Only thing you can do is feed her a diet heavy on insects and dust them with calcium with D3, have greens available all day, maybe feed multiple small meals several times a day so she has as much nutrients as she can ingest. Make sure her temps are ideal and she is housed alone to reduce stress. Prepare an egg laying chamber for her when she starts showing signs of digging and wanting to lay eggs.
It would also be a good idea to make sure you have the number of a reputable vet experienced with reptiles and bearded dragons just in case she has trouble laying eggs or becomes eggbond.
After she's done laying eggs, give her a bath to help rehydrate her and continue feeding her heavily.. most often if dragons produce one clutch of eggs they will produce another within a few weeks so you want her to gain as much weight as possible between clutches.
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PHLdyPayne