No, really. Just look at AMD's driver page:https://support.amd.com/en-us/download
If you choose the Notebook Graphics choice, the only options are GCN-based or older products that date to 2015 or earlier. If you choose "APU / Processor with Graphics", then for mobile, it's only Carrizo or earlier. In particular, Raven Ridge/Ryzen Mobile has no drivers. But they do have drivers for the desktop version of exactly the same chip.
I can understand that there aren't necessarily public drivers available when a product is first announced. Especially for laptop products, there can be a substantial delay between the initial announcement and the time that consumers can actually get the products in their hands. But HP has been shipping Ryzen Mobile-based laptops for more than half a year now. To still not have drivers available for that is inexcusable.
For what it's worth, there is now a driver for Kaby Lake-G:https://downloadcenter.intel.com/download/27785/Graphics-Radeon-RX-Vega-M-Graphics?product=80939
The product launched in March and drivers weren't available until May, which is kind of pathetic. And it's also only available for Windows 10 64-bit, which isn't that surprising, as that's about as well as Intel supports their own GPUs. In particular, they discontinued Linux support in 2011. But at least there is driver support for some OS--and the most popular one, at that. For Ryzen Mobile, there's nothing.
For years, the promise was that eventually, you'd be able to get a good CPU and a good integrated GPU in the same chip. Today, that has been realized for desktops. But still not laptops, which is where integrated GPUs are a lot more interesting because of the space and power limitations. You can get the good CPU and good integrated GPU in the same chip, but you can't get drivers for the GPU.