An interesting tip from a well-known leaker has seemingly revealed which AMD processors could find their way into Microsoft Surface devices in the not too distant future. It's expected the new Surface Laptop 3 will be configured with an AMD-based option, and it appears buyers will be able to choose between the mysterious Ryzen 5 3550U and Ryzen 7 3750U.
https://www.notebookcheck.net/New-tip-suggests-Microsoft-Surface-device-will-come-with-AMD-s-Ryzen-5-3550U-and-Ryzen-7-3750U-processors.435107.0.html