[AlanYx]

CarPlay supports notifications with non-first party apps like Microsoft Teams. I don't use everything on your list, but WhatsApp definitely supports CarPlay notifications. You may have them muted. You can mute/unmute on a per-app basis -- go to the app settings and adjust the "Show in CarPlay" toggle.

[brocket]

I haven’t used WhatsApp for while so maybe I’m wrong about that one, but Messenger definitely doesn’t work. I wish it was opt in by default for all notifications, it’s annoying so many don’t work.