DXGIXBOX_MODE_FLAGS (consoles XBOX Series)

typedef enum DXGIXBOX_MODE_FLAGS    
{  
    DXGIXBOX_MODE_FLAG_NONE = 0x0,  
    DXGIXBOX_MODE_FLAG_VARIABLE_REFRESH_RATE = 0x1,  
} DXGIXBOX_MODE_FLAGS  

bVRRSupported = false;

DXGIXBOX_MODE_DESC outputModes[32];
uint32_t outputModeCount = _countof(outputModes);

dxgiOutput->GetDisplayModeListX(backBufferFormat, 0, &outputModeCount, outputModes));

for (uint32_t i = 0; i < outputModeCount; ++i)
{
    m_vrrSupported |= (outputModes[i].Flags & DXGIXBOX_MODE_FLAG_VARIABLE_REFRESH_RATE) != 0;
}