Lenovo A475[1] is using a mobile version afaict. Unfortunately .. it's based on Bristol.
HP Envy x360 [2] seems to come out ~soon~ based on Raven, but the outlets/the community seems concerned that they'll limit those to single-channel. Which according to reviews in the past severely cripples the whole setup. That said, details aren't out so maybe HP does the right thing..
So potentially two options I'm aware of, one flawed and one potentially flawed.
The only other one I found was a (gaming) monster from ASUS that is not a laptop in my world..
That reminds me. I got kinda burned by AMDs laptop APUs a while back. This because the laptop i have seems to route the external screen through the iGPU, and AMD discontinued support for it quite early because it was a variant of their older GPU models.
Thus i am stuck using their older driver pack, and ever so often i have to beat back Windows trying to auto-update the driver...