This would only happen if the court ordered it, and that is very rare. It strikes me as possible that the items were not listed because they passed outside of probate. You need to have an attorney review this before you can determine if you even have a case. Your feelings about how the estate may be completely inaccurate. A lawyer can help you assess that.
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If you have a valid and just reason for your challenge-the court can order the estate to your legal fees.
The answer given does not imply that an attorney-client relationship has been established and your best course of action is to have legal representation in this matter.