Hi,
As a normal user, you cannot reset your MFA.
You have to be Global Admin.
See below thread for more details:
https://learn.microsoft.com/en-us/answers/questions/787388/reset-and-unblock-mfa-in-azure-active-directory.html
If you cannot receive notifications and you didn't register other means for mfa, you need to ask for mfa reset. When you register again you should add your phone as well to be covered.
Hope this helps!