Hi @Hedger, Michelle (Legal)
Thank you for contacting the Microsoft Q&A forum.
To better understand your situation, may I clarify whether the affected account is a personal Microsoft account (such as hotmail.com or outlook.com) or a work/school account?
If you are using a work or school account, could you please confirm whether you have reviewed the steps provided in the Q&A Assist response?
Additionally, you may consider reaching out to your IT administrator to verify whether Content search (eDiscovery) is applicable in your case to help locate the email. For reference, you can review the following documentation: https://learn.microsoft.com/en-us/purview/edisc-search-query
I hope this information provides some additional insight
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