It could be, if she wants it to be.
It could also be the type of case where her lawyers stop openAI from ever using her voice again, if she wants that to be the case.
Being rich opens up options. If openAI would be using my voice instead, they'd have a wildly less popular product but nobody to sue them for it, cause I'd be using my money to still dream about home ownership at some point before I die, not to hire lawyers or fight windmills.