Cygwin 3.4.9 - how to install ssh-keygen

[Matthias@gmx.li]

Dear all,

I've installed cygwin 3.4.9-1 in my virtualbox running on Windows 10.
After installing defaults plus openssh 9.5p 1-1, I open the Cygwin64-Terminal as Administrator and
run ssh-host-config.
 * Answered "yes" to create the /etc/ssh_config and /etc/sshd_config
 * Answered "no" to use StrictMode
 * and "yes" to install sshd as a service
 * I just press <enter> for the question for "Value of CYGWIN for the daemon".
cygrunsrv -S cygsshd will not start the sshd. The logfile say "no hostkeys available".

Unfortunately  I can't find ssh-keygen in the installable packages.
Howto install ssh-keygen or how to create hostkeys?

Thanks in advance
Matthias