Sadly NSO can't share their customers and they actually don't know many of them and are not exposed to the data. Whomever gets vetted by the US government and the hr Israeli government gets a copy.
I really dislike NSO to the point I don't join my wife on company vacations but she is her own person and I support her choises. She is not in software and the finance and accounting market here isn't nearly as nice.
You can support her as a person but you should not support her choice to work for a clearly unethical company who has actively contributed to the violation of human rights and murder of innocents.