The GeForce RTX 3070 Ti mobile GPU appears to be based on the existing GA104 die that powers the RTX 3080 version and is rumored to come as a response to Intel's ARC Alchemist laptop GPUs releasing in Q1 2022.
https://www.notebookcheck.net/More-Ti-upgrades-an-RTX-3070-Ti-laptop-GPU-could-also-be-in-the-cards-for-early-2022.577093.0.html