According to the documentation, I need to do the following:
...
- Open the Notifications composer and select New notification.
- Enter the message text.
- Select Send test message.
- In the field labeled Add an FCM registration token, enter the registration token you obtained in a previous section of this guide.
- Click Test
But when I compose a notification, the pop-up looks like this and there is nowhere to add the token ID of the device; not to mention that there is no "Test" button. Am I missing something?
The pop-up you shared appears when you click on the "Review" button at the bottom of the page. You can find the "Send test message" button on the right side of the page under "Device preview" section. After you click on "Send test message", a pop-up will be shown where you can add an FCM registration token and click on the "Test" button.