Background Notification in PWA angular don't work (macOs and windows)

I was implementing Firebase notifications in one angular app, multicast ones. They worked really well in foreground in all the operative systems, unless in Safari browser in Mac (in chrome worked well in Mac too).

However, background notifications are working with the expected behavior in Linux OS (they appear and they are clicable), but in windows they worked but are not clicable. And in mac they don't appear at all.

What is the problem? How can I get the same behavior in Windows and Mac?

Reproduce the Angular PWA's Firebase multicast notifications in foreground and background on Linux, Windows, and macOS, including Safari and Chrome. Compare whether background notifications appear and are clickable, then document the platform-specific cause and the resulting fix or limitation.

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