...
Please be aware that no data is being stored on your mobile device, it is simply used by the systems to prove something is in your possession. You can also opt in to this method to secure your own personal email/social media as well, E.g. Facebook, Gmail, hotmail, outlook.com, Instagram, Twitter, Government Gateway. The The use of MFA not onlyis to help protect your data, your colleagues and student’s data, etc.
You can select to receive a code via text message or phone call however (see above FAQ) if you do not wish to uninstall the authenticator app, there are drawbacks though as described in the answer to the question above.
If you still have concerns however please raise a self service ticket here where your line manager can then review with a view to potentially funding a college mobile device for you to use for the purpose of MFA:
...