Will Meta3 rotate the view downward before rendering?

I found that the Meta3 VR device does not display the direction specified by the Unity scene Camera when showing the screen (for example, (0,0,0) Euler Angle), but instead rotates 12° downward on the screen, that is, (12,0,0) Euler Angle. Note that this does not directly modify the Transfrom but seems to be an internal change made by meta itself.
I know that the best comfort zone for people is when the forward perspective is slightly lower. Meta's approach is very considerate.
But I want to know how I can obtain the specific Meta parameters for this downward offset Angle.