Review on High-Speed Intel Certified CalDigit Thunderbolt Cable - Optimum Data Transfer and Exceptional Performance by Cole Dutta

The cable is said to support a display up to 8k but it only allows screen mirroring on my dual 3k monitors. You cannot extend the screen. My two monitors are daisy chained and the Thunderbolt is connected to the upstream monitor. Note: If you have two lower resolution monitors like 1080, they will work fine. In this case, however, a regular USB-C cable will suffice, so you don't even need the supposed Thunderbolt 4 cable.