Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Since your account is school account, it is managed by your school's IT department. Microsoft doesn't have direct access to reset authentication settings for organization-managed accounts.
In this situation, you must contact your school's IT administrator and request a reset of your MFA settings by following this article: Manage authentication methods for Microsoft Entra multifactor authentication - Microsoft Entra ID | Microsoft Learn
I hope this information helps and if you have any further question, please feel free to ask via comment section.
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