Hello,
Thank you for posting in Microsoft Q&A.
Based on the description, I understand your question is related to BitLocker.
Generally, we can refer to the following path to find out the BitLocker recovery key, because this is a personal information and will not be collected by Microsoft, so please kindly try to find carefully if the key was saved in below places:
In your Microsoft account: Sign in to your Microsoft account on another device to find your recovery key. If the device was set up or BitLocker protection was activated by another user, the recovery key may be in that user’s Microsoft account.
On a printout you saved: Your recovery key may be on a printout that was saved when BitLocker was activated. Look where you keep important papers related to your computer.
On a USB flash drive: Plug the USB flash drive into your locked PC and follow the instructions. If you saved the key as a text file on the flash drive, use a different computer to read the text file.
In an Azure Active Directory account: If your device was ever signed in to an organization using a work or school email account, your recovery key may be stored in that organization's Azure AD account associated with your device.
If you are unable to locate a required BitLocker recovery key, I am afraid you cannot access that drive.
Have a nice day.
Best Regards,
Molly
============================================
If the Answer is helpful, please click "Accept Answer" and upvote it