The core part of it is unchanged.
All CPUs with the Zen2 Architecture are made out of the exact same 8 Core die. Ryzen, Threadripper and Epyc. And that is one of the big advantages that AMD currently has compared to Intel. Take a look at the pictures. The CPU actually consists of 3 Parts: CPU, GPU, Interconnect.
What's new with this CPU is the GPU Die that is soldered right next to the CPU and the interconnect chip that combines CPU and GPU.
These APUs are all single-die parts combining both the CPU and GPU cores, along with the IO, onto the one die. They share that die across the entire 4000-zeries APU lineup though.
What's new with this CPU is the GPU Die that is soldered right next to the CPU and the interconnect chip that combines CPU and GPU.
It should have been:
Ryzen 1000 - Zen1
Ryzen 2000 - Zen+
Ryzen 3000 - Zen2
But it is:
Ryzen 1000 - CPU: Zen1, APU: -
Ryzen 2000 - CPU: Zen+, APU: Zen1
Ryzen 3000 - CPU: Zen2, APU: Zen+
Ryzen 4000 - CPU: ?, APU: Zen2