Meta VR Glasses: What Is the Optical Focal Distance of the Virtual Image?

For Meta VR Glasses, what is the fixed optical/accommodative focal distance of the virtual image, measured from the eye?
Could you provide it in meters and/or diopters?
I am asking about the physical optical focal plane of the micro-OLED + pancake optical system, not the rendered vergence distance of virtual content.
For example, is the display optically collimated to infinity, 2 m (0.5 D), 1.3 m (~0.77 D), etc.?
Is the focal distance fixed, or does the system have any varifocal/multifocal capability?