Hello, thank you for reaching out to Microsoft Q&A.
Is the Microsoft account linked to your BitLocker recovery key blocked, or do you no longer have access to that account?
What is the exact error message you receive when you try to sign in with your Microsoft account here:
https://account.microsoft.com/devices/recoverykey
Note: If you are unable to sign in and locate the BitLocker recovery key, you will not be able to bypass the BitLocker encryption on your drive. In that case, you will need to create a Windows 11 bootable USB installation media and reinstall Windows, which will completely wipe all the data on your hard drive.
Windows 11 Clean Installation Process-