(disclaimer: I'm leading the Docker Model Runner team at Docker)
You were always able to manually install Docker CE within WSL2 on Windows.
But if you want to have an integrated Docker experience on the Windows host, you need to use Docker Desktop, which will ship it's own Linux VM and performs the transparent integration with the Windows host.
This is fully independent of the Docker Model Runner feature thought :)
(disclaimer: I'm leading the Docker Model Runner team at Docker)
You were always able to manually install Docker CE within WSL2 on Windows. But if you want to have an integrated Docker experience on the Windows host, you need to use Docker Desktop, which will ship it's own Linux VM and performs the transparent integration with the Windows host.
This is fully independent of the Docker Model Runner feature thought :)