I tried on ULTRAWIDE monitor. And then I thought maybe there is a resolution limitation. Next I connected to Full HD monitor and nothing happened.
When I click FN+F8 on CLOVER menu the HDMI monitor is working well, laptop display is blank, and after loading MacOs both are blank, when I connected the DP (over type-c) monitor (DP connected) is working well.
And I can't enable the laptop dispaly (pressing Fn+F8). I have to restart.
Maybe this will helpfull.
If it's possible to connect this laptop through VGA connector I'll happy