Split hdmi signal on MacBook
So I am using a dual monitor setup with my MacBook Pro 16 (wich is closed and loading while working). I bought the ICY BOX IB-DK2106-C with two hdmi outputs, but the displays are synchronized and I can't change that in the settings because the MacBook doesn't recognize the two displays. (Drivers are already installed). My goal is to obviously split the signals so I can use both displays efficiently without using another small hdmi adapter.
Best regards
MacBook Pro