I have tested this program on a Ryzen 3750h and a Ryzen 3250u thus far and it works on both. Now, this program isn't perfect and doesn't provide as many features as throttlestop or Intel XTU / Ryzen Master, but it does allow Voltage control, and can drastically improve your performance and temps while under load.

There is a little program that isn't too well know and is misunderstood regarding how to use it by many which does actually allow you to lock core clocks down on all cores and set a constant voltage on most, if not all Ryzen mobile chips. The program is great but it fails to provide the single most important control for overclockers - Voltage control. You cannot use Ryzen Master on the mobile platform currently, and i have yet to see a full-on overclock and processor control utility thus far for Ryzen mobile, the closest thing we have currently is AMD APU Tuning Utility This could be said about intel CPU's as well as any processor running boost will programmatically keep boosting until they hit a power and / or thermal throttle, the difference being that intel mobile chips can be undervolted for the most part, many manufacturers locked down this ability but this can be undone by simply downloading older bios versions. I have had 2 laptops now running the ryzen mobile platform, and have been thoroughly dissapointed with AMD's software support of their own CPU's, they perform pretty bad with the stock voltages and boost, mostly due to extreme thermals.

Ryzen controller ryzen 5 3500u