Thanks for posting!
We don’t have the specific Lenovo system your mention in our test lab, so unfortunately we cannot guarantee compatibility with our Thunderbolt 3 dual display adapters. Each manufacturer can design their Thunderbolt 3 systems differently, and those internal design decisions can affect if two video outputs via our adapter will work as expected. Looking at the model’s system manual -> https://download.lenovo.com/pccbbs/mo… (on electronic pages 52 and 53) it does not provide any clarification as to the number of displays supported via the Thunderbolt 3 port, but if taken literally only one display is supported.
There have also been reports online of the T470 only supporting one video output using Thunderbolt 3, one such example is here -> https://forums.lenovo.com/t5/ThinkPad…
Given the unknown compatibility and the third-party reports, unfortunately I would not recommend purchasing our Thunderbolt 3 Dual Display Adapter for use with the Lenovo T470. Apologies if that sounds overly negative, but we like to do our best to set honest expectations up front to help prevent frustration later on.
To your question, the other forum post you link to is not relevant as it refers to USB-C devices rather than Thunderbolt 3 devices.
Sorry we couldn’t be of more help!