macOS has its "osascript" with "display notification", Linux has its "notify-send". Both are the most native way to generate DE notifications. What is the most native way to generate desktop notification in BSD unixes?
As stated in OP's comment, most dekstop environments, in particular KDE-Plasma and Gnome use their own implementations to display notifications based on kernel agnostic DBus. Implementation that just cannot be replaced. ( Some notification daemon is started at DE launch time )
If you also need a daemon because your DE does'nt implement anything then you should probably go with the notification-daemon.