Is "Rysen Master" incompatible for "Ryzen 5 3550H Radeon vega mobile gfx"
Correct, it is locked out on most laptop models.
There is a laptop Ryzen Master Clone called Ryzen Controller. This has be updated to a newer program that incorporated Ryzen controller.
GitHub for Ryzen Controller: https://github.com/Ryzen-Controller-Team/Ryzen-Controller
Gitlab for Ryzen Controller: https://gitlab.com/ryzen-controller-team/ryzen-controller
LO4D gives some good info and download for Ryzen Controller: https://ryzen-controller.en.lo4d.com/windows
Here is a Tom's Hardware review of Ryzen Controller: https://www.tomshardware.com/news/ryzen-controller-software-amd-ryzen-laptop
Are the above sources can be trusted. And some of which are unavailable for 5x series.
You can trust the Github and Gitlab links. I know that Github is owned by Microsoft.
The LO4D link is new to me so you can skip that link or you have a very good Anti-Virus installed. You can google LO4D and see if there are any indications of malware at that website.
Ryzen Controller is like a "Lite" Ryzen Master but it is only compatible up to the 5000 series processors. So it should work with your 3000 series laptop processor.
Just remember that if you should overclock the processor your laptop will run much hotter so you need to check to make sure you laptop doesn't overheat.
EDIT: Looking at your 3550H Specs:
AMD Configurable TDP (cTDP) 12-35W
Unlocked for Overclocking No
Thanks for everything, Can I change my Power option setting to ultimate performance. Mine is a HP Pavillion with Ryzen CPU & Nvidia GeForce GTX 1650. Even after changing my advance system settings to custom, my startup is slow, overall performance seems slow. That too after I got all of my drivers updated still no improvement. Would changing bios settings will help. And also it is more to do with my CPU settings right. On right settings it should work smooth.