Right-click on it and choose WSL Tech Preview to launch the Docker WSL2 installation tool. This checks for the correct Windows version, makes sure that you’re running Ubuntu as a WSL2 instance ...

If you get Unexpected WSL error when trying to run WSL command in Docker Desktop, follow the proven solutions mentioned in this post.

Docker announced that its native Docker Desktop Windows application will soon switch to the Windows Subsystem for Linux 2 (WSL 2) from the Windows-native Hyper-V virtualization it currently uses.