On Windows 10 + WSL 2, Docker volumes are located here (type in the Windows file explorer):
Docker v26.1.4: \\wsl$\docker-desktop\mnt\docker-desktop-disk\data\docker\volumes
For older versions of Docker:
\\wsl$\docker-desktop-data\data\docker\volumes
\\wsl$\docker-desktop-data\version-pack-data\community\docker\volumes