Adding corset back to beaded dress

Of course, it just might cost more if they have to rebead the back.

Yes my friend has this done to her beaded dress

That is going to be a really expensive alteration. I'd try to find a beaded dress with a corset back already

My friend added a corset to her gown. Her seamstress said it was much harder to add one than to remove a corset. It’s also much more expensive. But it’s definitely possible. Just make sure you have the time and room in the budget for it.