Show on Mobile, Dekstop
Uncheck these two options(the default settings) to display the icon on both the devices.
Show only on Mobile / Hide only on Desktop
To display on Mobile: uncheck “Hide on – Mobile Devices” and check “Hide on – Desktop Devices” .
Hide only on Mobile / Show only on Desktop
To display only on Desktop and hide on mobile: check “Hide on – Mobile Devices” and uncheck “Hide on – Desktop Devices”.