Subsystem for 5.1

"OpenSSH for Windows" version
8.9.1.0

Server OperatingSystem
Windows Server 2016 Standard

Client OperatingSystem
Windows Server 2022 Standard

Is it possible to have a subsystem for Powershell 5.1?
I currently have this working:
Subsystem powershell c:/progra~1/powershell/7/pwsh.exe -sshs -NoLogo

I also have these set in registry:

PS C:\Windows\system32> Get-Item HKLM:\SOFTWARE\OpenSSH\


    Hive: HKEY_LOCAL_MACHINE\SOFTWARE


Name                           Property
----                           --------
OpenSSH                        DefaultShell              : C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                               DefaultShellCommandOption : /c


PS C:\Windows\system32>

When i ssh into the machine with ssh.exe i get Powershell 5.1. When i Invoke-Command from Powershell 7.2.3 on my client, i get into Powershell 7.2.3 on the server as well. Is it possible to enter Powershell 5.1 from 7.2.3?

I was thinking a subsystem for 5.1, but powershell.exe doesn't have the -sshs switch and this doesn't work:
Subsystem powershell5 c:/Windows/System32/WINDOW~1/v1.0/powershell.exe -NoLogo

No repository files or tests are named. Start by locating the existing Subsystem handling and reviewing how Windows PowerShell 5.1 accepts command-line input compared with PowerShell 7's SSH mode. Done means establishing whether a supported PowerShell 5.1 subsystem is possible and defining the required implementation or documentation.