Hello!

I use KDE Neon and find what global menu working only in KDE applications.
Not working in GTK: Firefox, VmWare Horizon client, Inkscape, Gimp, WPS Office

Is the way to fix this?

With KDE Neon I have the same issue for some apps ... As I just installed KDE Neon, the list is short:
Chrome

PyCharm initially didn't work either, but reactivating the experimental feature for linux native menu and rebooting, I got it to work.
As I am very often on a laptop and on my way, I actuallyneed the global menu to work without flaws, which it did under Kubuntu ...

But I haven't found a solution for KDE yet ...

Hiya,
I run MXlinux and Plasma and my global menu does not work correctly: if I open Dolphin whichuses global menu, the menu appears while I am inside the dolphin window and it disappears as soon as I move the pointer out of the Dolphin window.
I have tried all the KDE resetting tricks: delete or rename KDE config files or txt config files and nothing works. I wish some developer could help here!!