FUD Zilla points out that despite being one of the best mobile processors ever created by AMD, the Ryzen Mobile is unable to score significant design wins. OEM PC makers are very slow to adopt the chip. There are some mainstream laptops with Ryzen Mobile, but no laptop maker is willing to put AMD's new chip in a flagship product.
The site speculates this is unlikely to change in the near-future:
Some of the OEMs we talked to simply admitted that despite the fact that Ryzen mobile is quite a good solution, the designs were simply locked years ago with Intel. In most cases, OEMs could not spare the engineers on a dicey project with uncertain success.
AMD has image issues to address in notebook space. And sitting in the lowest end designs and going from that to a premium flagship design is a hard process. Things might get better, but we question AMD’s possibility to surprise us with a follow up with a new mobile chip in 2019.