Use your Oracle Athenticator on Android via your Garmin smartwatch

In fact, this is a generic feature of the Garmin integration with Android smartphones. If you use the Oracle Authenticator to log into your Oracle Cloud account, you can use your Android smartphone for two-factor authentication. When logging into your account, you will get a notification on your phone.

Luckily, Oracle included the Allow and Deny options directly into the notification, so you can make your choice without opening the app. I know other authenticators, that are not so smart (hello PayPal).

You can make use of this, if you have Smart Notifcations enabled at your Garmin watch and added the Oracle Authenticator to your allow list.1

When you get a Login Attempt message on your phone, that will also be mirrored to your watch. Notice the blue'ish mark on the upper right button, press it.

That will bring up the same choices as in the phone notification. So choose your option here and you are done.