I know this is frustrating. Have you checked if your BitLocker recovery key was ever saved somewhere else, like on a USB drive, printed copy, or another Microsoft account?
BitLocker recovery keys are tied to your Microsoft account for security, and Microsoft does not offer a way to skip or shorten the 30-day waiting period once you request to replace your security info. The wait time protects your account from unauthorized access. You’ll need to wait for the update to finish, then sign in to your Microsoft account and get the key from the BitLocker recovery page.