Ask HN: What do you use for OTP?

FreeOTP+ supports key export, so you can copy all the keys to a new phone while still having them on the old one. (Only for Android though) https://f-droid.org/packages/org.liberty.android.freeotpplus

Google Authenticator does now have an export function, it works with QR codes, I just make a backup on a second device.

For non important things I use my password manager.

For important things I have physical security keys if it's supported, otherwise the Google Authenticator app.

1Password

FIDO keys