OpenSSH ships with Windows as an optional feature. See the Install OpenSSH doc. Administrator privileges in Windows are required to run OpenSSH in WSL. To run an OpenSSH server, run your WSL distribution (ie Ubuntu) or Windows Terminal as an administrator. There are several resources out there covering SSH scenarios with WSL. Check out Scott Hanselman's blog articles: How to SSH into a Windows 10 Machine from Linux OR Windows OR anywhere, How to SSH into WSL2 on Windows 10 from an external machine, THE EASY WAY how to SSH into Bash and WSL2 on Windows 10 from an external machine, and How to use Windows 10's built-in OpenSSH to automatically SSH into a remote Linux machine.