When I initially installed Manjaro GNOME, apps currently running would be displayed in the panel on top of the screen.
Recently this hasn’t happened which is inconvenient when using Guake. I tried installing AppIndicator and KStatusNotifierItem Support but my zsh version isn’t listed in shell versions.
Sometime that works:
but if you are using Wayland - there is a note on this page,
maybe the other mentioned apps suffer?