The pictures seem to show two iPhone rear glass parts in Space Gray, with one having an extra cut out under the ultrawide lens hole, seemingly for a LiDAR scanner. There are additionally holes for 3 camera lenses and a TrueTone LED flash, which suggests these are both from “pro” models.
The actual models that each of the rear glass panels is from are unclear since no other edges are seen in the image. It is feasible that one is the 6.7-inch “iPhone 12 Pro Max”, and the other is the smaller 6.1-inch iPhone 12 Pro. This would imply that the 6.1-inch iPhone 12 Pro doesn’t have the LiDAR scanner, leaving it solely for the 6.7-inch “iPhone 12 Pro Max,” which has been supported by previous rumors.
Alternately, if both iPhone 12 Pro models are to feature LiDAR, then the glass without the extra hole for the scanner might in fact be from the current iPhone 11 Pro.
At least one model of the iPhone 12 Pro has been widely reported to have a LiDAR scanner, first seen on the 2020 iPad Pro, to sense depth and enhance AR experiences.