Modifier key - fn

[Fritz Lang]

I have a Logitech K750 keyboard.

I use Karabiner to set the Caps lock to Cmd/Cntl/opt/shift and trigger QS with that and Tab.

Caps Lock also becomes my main trigger for QS combos.

Is there a way to use the fn key with QS to trigger a few docs (as I’ve run out of  Cmd/Cntl/opt/shift combos) ?

Or is that a Karbiner question?  Since this is not a true Mac keyboard.

Or another way to set Caps Lock to Cmd/Cntl/opt/shift with QS or other method?