The new Ryzen mobile series is suspected to have a mix of Zen 2 and Zen 3 parts, according to different leaks as shown in the table below (courtesy of NotebookCheck).
https://www.techspot.com/news/87696-amd-preparing-ryzen-5000-apus-laptops-but-not.html?utm_source=dlvr.it&utm_medium=blogger
https://www.techspot.com/news/87696-amd-preparing-ryzen-5000-apus-laptops-but-not.html?utm_source=dlvr.it&utm_medium=blogger