Duel Display
 

Hi
Im trying to add 2No PC Displays with my MacBook being the main display and other monitors being extended.

I have a USB C extension to 2No HDMI ports. My monitors are then linked via a HDMI Cable.

Both Monitors are on and working however they are both displaying in mirror to each other.

within display settings only 1 monitor is shown. I have installed the DisplayLink software but still no joy

what am I doing wrong?

What adapter do you have?
But from the description, it does look like you have a native USB-C adapter and not a DisplayLink-based adapter.