sudo nano /lib/udev/hwdb.d/60-keyboard.hwdb
add at the end of the # Micro-Star section
# Keymaps MSI Prestige And MSI Modern FnKeys and Special keys
evdev:atkbd:dmi:bvn*:bvr*:bd*:svnMicro-Star*:pn*Prestige*:*
evdev:atkbd:dmi:bvn*:bvr*:bd*:svnMicro-Star*:pn*Modern*:*
KEYBOARD_KEY_56=backslash # Secondary backslash key
KEYBOARD_KEY_f1=f20 # Fn+F5 Micmute