Intel's aging iGPU is holding back some high-end business convertibles from being even better. Fortunately, this will be the last generation before the EliteBook x360 1040 will drop Comet Lake-U for the vastly superior Tiger Lake series.
https://www.notebookcheck.net/The-HP-EliteBook-x360-1040-G7-is-one-of-the-best-convertibles-money-can-buy-if-you-don-t-care-about-its-weak-UHD-graphics.527694.0.html
Why not an AMD + Iris option?! :-[
You're kidding, right? First, Iris is Intel's old generation, and arguable worse than AMD's competing product; second, Intel will never lisence it's integrated-graphics tech to it's main competitor. Intel's rumored Xe dedicated cards will have to work with AMD CPUs, but their Iris line was never intended to work on the same package as an AMD CPU.
So not only is it extremely unlikely from pure competition, it would require too much individual effort from the laptop maker to integrate the devices to make a competitively priced product, and it wouldn't even be competitive in terms of its performance. To to it off, it would require completely different production as the chips that would be paired, AMD CPU, Intel mGPU, are not currently package without the two companies own CPU/GPU already