My Bambu Lab notifications don’t vibrate or produce any audible sound.
It is important to note that notifications (push or local) only produce sound or vibrations if the data payload includes those requests by the sending party.
If they do not request either, the user will not get them.
Not all apps request sound or vibration. This is often so they do not disturb the user which is a common read for users to disable notifications.
The options you see in settings allow you to stop choices set in the payload from occurring, but, do not force them to occur.
The audio made from a notification is either the default noise you set in the sound settings or the app must include its own sound file the notification will trigger upon receipt.