Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hi Kerstin,
I completely understand that you wanted to recover your account with two step verification but unable to get the code due to the app has been reinstalled while the MFA is still enabled.
Just to let you know, Microsoft accounts are completely manage by an automated server, and we do not have manual access to it since people here in Forum are not directly working from Microsoft, we are an independent advisor and a Microsoft fan like you.
Microsoft takes very seriously the security and privacy of their customers. As they are committed to protecting your personal information and the meticulous account recovery process is intended to protect you from any possible malicious activity.
You can also refer to this link for reference and see Important note listed: https://support.microsoft.com/en-us/account-billing/help-with-the-microsoft-account-recovery-form-b19c02d1-a782-dee6-93c3-dc8113b20c42