Sole Global Administrator locked out of Microsoft Entra ID Free tenant after losing Authenticator

Hello Microsoft team, I am the sole Global Administrator of an existing Microsoft Entra ID Free tenant. After replacing my phone, I lost access to the Microsoft Authenticator registration on the old device. My password is accepted, but the sign-in page offers only approval in Authenticator or a verification code from that app. I have no other administrator or usable MFA method, and I cannot access the admin center to open a support case. Could a Microsoft moderator help initiate a tenant-lockout recovery case with the Data Protection / Tenant Recovery team? I am ready to verify ownership and provide the affected account and tenant details through a private message or an official support channel. I do not have an active paid subscription and would prefer written communication if available. Please let me know the next steps. Thank you.