Created attachment 168246 [details]
Output of xev command after pressing calculator and +/- button

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SUMMARY

My Dell Lattitude keyboad has a Calculator and +/- button. Botton buttons are detected as XF6Calculator and F9 in xev command. Please see attached screenshot of xev.
Issues: 
1. KCalc doesnot launch by pressing XF86Calculator button. (It works fine whenever I use Gnome and launches gnome-calculator on same laptop)
2. +/- button should not be registered as F9
3. XF86calulator button is not register in systemsettings>Keyboard>Shortcuts so it cannot be assigened to any app.


STEPS TO REPRODUCE
1. On UK layout keyboard with dedicated Calulator button (picture attached), press the the Calculator button

OBSERVED RESULT
Nothing happens.


EXPECTED RESULT
kcalc should launch,

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: KDE Neon
(available in About System)
KDE Plasma Version: 6 
KDE Frameworks Version: 6
Qt Version: 6.6.2

ADDITIONAL INFORMATION
(KDE 5 also had the same issue)