Welcome! Thank you for your question.
The court appointed executor or administrator of a person's estate is entitled to see ALL account information of the deceased for ALL accounts that the deceased owned at death. This would also entitle the executor to be entitled to all documentation related to those accounts including beneficiary designations.
With that said, if the accounts did have beneficiary designations then the assets in those accounts would pass to the named beneficiaries regardless of what the will says. The will only controls assets that are solely owned by the deceased without beneficiary designations.
I cannot provide you with legal advise. I have provided you with information about the law related to your question. My answer, and any information that you find online, should not take the place of having a consultation with a lawyer in your area to advise you regarding your specific issues.
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