Try this:
- For NotificationOut component in the editor enable OnComplete and make a function with the same gameobject
- Under DOTweenAnimation function set, do a DoRestartByID, and set "NotificationIn" string as the value. This is basically saying when the tween completes, callback will trigger the second tween
- In your NotificationIn tween, set delay to 2.5 to give it the pause you want before tweening starts