After some confusion over the statuses of Android 7.0 Nougat OTAs and factory images for several devices, including the Nexus 6P, Vodafone Australia has finally given us some answers. Just a few days ago, their support page was updated to confirm that the update has been halted for the 6P.
Vodafone doesn't give many details, only saying this:
An issue is affecting rollout of this software update and we are working with Huawei to resolve ASAP. We apologise for any inconvenience caused and will keep you posted as soon as we have an update.
Quite a few people have been complaining about the Nexus 6P's performance and/or battery life after the Nougat update, so this doesn't come as too big of a surprise. Google's Nexus OTA page still doesn't have a Nougat OTA posted for the 6P, and any OTAs you see online were pulled from the Android Beta Program using adb logcat.
Unfortunately, we still don't know where the Nexus 6 and Nexus 9 LTE's Nougat updates are, but we've reached out to Google about all of these devices.
- Vodafone Australia