HP Zbook Power G9 - Display settings can not be set to use Nvidia card

[Opa11]

Hello HP experts and everyone!

I would like to ask your advice on the following problem:
There is a HP Zbook 15 Power G9 with i7-12700 and T600 Nvidia card and Win11.

The problem is that even when an external display is connected to the machine, the image is sent out via the Intel integrated display.
You can't set the Refresh rate as widely, as you could with Nvidia, and you can't set special color settings in the nvidia control panel.
There is only Integrated/Hybrid setting option in Bios. (Hybrid is set).
We have checked the HP official latest nvidia driver and the Nvidia latest driver also -> No luck.
In the Advanced Display settings, under Display information, we can always seen the Intel's display as used/active.

In the Nvidia Control Panel/Manage 3D settings, High-performance Nvidia processor is set.
The situation is the same with a monitor connected to an HDMI output or to a Type-C->Hdmi converter.

I read that in the case of Type-C, the signal comes via the Nvidia GPU, but unfortunately it doesn't use nvidia either.

On a Zbook 15 G6 which use the same Win11 and Nvidia driver (with a T1000 GPU), you can normally use Refresh Rate and other color settings. Under Advanced Display settings, the Nvidia GPU is visible under Display information.

On the problematic machine, when we use a GPU-intensive application, we can see that the machine is using the Nvidia card, there is no problem with that, but it still sends the signal to the external output via Intel and it limits the options.

Do you have any ideas on how to solve this problem?
Is this hardwired like this in the Power G9? Or maybe somehow this can be solved in software, even with a 3rd party tool?

Any help or advice would be much appreciated!
Thank you in advance!