A: No. Without backup, the only way is to locate the original printed key, the key stored in Microsoft Account (personal devices only), or use the Data Recovery Agent (if configured).
If you're interested in reading more about BitLocker and recovery key management, I recommend checking out the following papers: get bitlocker recovery key from active directory
dsquery * "CN=GUID,CN=ComputerName,OU=Workstations,DC=domain,DC=com" -attr msFVE-RecoveryPassword When the GUI or PowerShell fails, ADSI Edit
The policy requiring backup was not active when encryption occurred. Always verify the identity of the user requesting
When the GUI or PowerShell fails, ADSI Edit provides raw access to the directory. Use with caution.
Remember that the BitLocker recovery key provides full access to the encrypted drive data. Always verify the identity of the user requesting the key before providing it. If possible, provide the key verbally rather than via email to maintain a secure chain of custody.