[Rumour] Photos of the back of the Mi MIX 3 in two colours with fingerprint sensor

Our current Mi MIX 3 leak this time is about the back of the device, which reveals something interesting. While we already have official pictures and details of the new flagship, which will be unveiled on October 25, we also have some suspicious, less believable information and pictures. This is one of them, or perhaps a picture of an earlier prototype.
The dual 24MP front-facing camera is real, as is the Xiaomi CEO first published on Weibo and then removed watermarked night photo also seems credible.
I treat the current photos with reservation. I don't understand why the shaving cream bottle was missing from the composition, as the yellow bottle next to it detracts from the overall picture. We see the black and blue Mi MIX 3(?), and pretty much where the back of the Mi 8 is, a single fingerprint sensor.

Based on all the data so far, this should not be where it is highlighted in the bottom picture. I rule out the possibility that only the Mi MIX 3 Special Edition art edition would get the under-display fingerprint sensor, as there's already the Mi 8 Pro with the same technology alongside the Mi 8 Explorer Edition.
The glass back is clear (and ceramic in white), so Qi charging will probably be standard on all versions.