Sole Global Administrator locked out by MFA - Tenant Recovery needed

I am locked out of our Microsoft 365 Business tenant.

I am the sole Global Administrator.

The password is correct, but Microsoft Authenticator MFA cannot be completed. The Authenticator notification does not arrive, and no valid verification code is available.

There are no other Global Administrators and no alternative authentication methods.

I cannot access the Microsoft 365 Admin Center or Microsoft Entra Admin Center to reset MFA.

Please escalate this case to the Data Protection / Tenant Recovery team so they can verify tenant ownership and reset MFA for the Global Administrator account.

I can provide the tenant domain, admin account, billing information, domain ownership proof, company information, and screenshots privately if required.

I also tried Microsoft phone support, but the automated phone system ended the call before I could reach a support agent.

<モデレーター注>
この質問には、重複投稿されたロック済みのスレッドがあります。
重複投稿は、混乱を招く原因となりますので、避けるようにしてください。
ロック済みスレッド：Microsoft 365の唯一のグローバル管理者がMFAでロックアウトされ、テナント復旧が必要
本スレッドにて質問などを継続してください。