To repost other user posts on your nXlvl account you can tap on the "Share" icon on the post which you want to repost on your nXlvl account and select the first option i.e. "Repost".
To "Receive/Mute" notifications when someone "Reposts" your post on their profile on your nXlvl account please follow the steps shown below, 1. Navigate to the profile page by tapping the "Profile" icon located at the right bottom of the homepage. 2. ...