Here is a quote from a PC world article published today:
Microsoft’s Surface Laptop 4 includes two Ryzen chips: the Ryzen 5 4680U Surface Edition, and the Ryzen 7 4980U Surface Edition. These are semi-custom processors, co-developed by AMD and Microsoft, and they required some specialized engineering. They’re not sold by AMD, and can’t be found in any other laptops. Because of the advance development time, they’re built on AMD’s older Zen 2 architecture, rather than the Zen 3 foundations of the new Ryzen 5000 Mobile chips.
Microsoft’s Surface Laptop 4 includes two Ryzen chips: the Ryzen 5 4680U Surface Edition, and the Ryzen 7 4980U Surface Edition. These are semi-custom processors, co-developed by AMD and Microsoft, and they required some specialized engineering. They’re not sold by AMD, and can’t be found in any other laptops. Because of the advance development time, they’re built on AMD’s older Zen 2 architecture, rather than the Zen 3 foundations of the new Ryzen 5000 Mobile chips.