The codename given to an AMD engineering sample processor has been leaked online and has already sparked considerable speculation as to what it could be. A breakdown of the name seems to point at the chip being a desktop APU from the Picasso range based on the Zen+ microarchitecture. This series currently consists of just mobile processors.
https://www.notebookcheck.net/Mysterious-reported-AMD-engineering-sample-could-be-Picasso-desktop-APU.415663.0.html