Hi,
Thanks for posting in Q&A platform.
Regarding of your issue "sshd and sshd agent service not appearing after install of openssh server/client", here is a similar thread discussed before, please refer to the following link to see if it was helpful.
https://superuser.com/questions/1392793/sshd-service-on-windows-server-2012-r2-not-showing
I also found following articles regarding of installing and configuring OpenSSH for your reference:
https://github.com/PowerShell/Win32-OpenSSH/wiki/Install-Win32-OpenSSH
Installation of OpenSSH For Windows Server 2019 and Windows 10
OpenSSH Server Configuration for Windows 10 1809 and Server 2019
Please Note: Since the websites are not hosted by Microsoft, the links may change without notice. Microsoft does not guarantee the accuracy of this information.
Hope my answer will help you!
---Please Accept as answer if the reply is helpful---
Best Regards,
Sunny