Trigger notification from PacketTunnelProvider?

I'm trying to figure out how to trigger local notifications from my packettunnelprovider. In case the primary application is closed. It would be nice if I could implement it on both macOS and iOS. These notiications would be used for various things (i.e. You've used x amount of data in the last day / We blocked this potentially malicious IP / etc). Ideally, the notifications would then open the primary application to display details about the message when tapped.