Hi,
when you have install openssh by
PS D:\> Add-WindowsCapability -Online -Name OpenSSH.Client~~~~0.0.1.0
then the installed version will never get updates.
Some older version (8.x.x) might have scp performance issues and therefore an update makes sence :-).
To get the latest version go the the github project site , download the latest release and install it. Select the latest msi file and install it.
Michael