If so, eventually you'll end up replacing your phone, and you might need a guide on how to transfer that 2FA code generation from the current phone to the new phone. How do you do that? Gizmodo's Field Guide has you covered.
They also explain how to do this with Apple and Microsoft accounts, as well.
You DO use 2FA (two factor authentication), right? Please do. It can perhaps be imperfect, but I've personally seen it save the day when people have tried to nefariously access the email accounts of my friends (and even my own account).