bretzeli why not just run
Install-Module PowerShellGet -Force -AllowClobber
Close the PowerShell window and re-open an elevated PowerShell prompt (Run as Administrator).
Install-Module -Name Import-WsusUpdate
And then run
Import-WsusUpdate -KB KB5037422
The only thing not in there is the commands to enable SchUseStrongCrypto except for WAM Users who can simply run from the WAM Shell
Set-SchUseStrongCrypto -Value 1
But likely if you're using WAM, you already had SchUseStrongCrypto enabled as WAM ensures your WSUS environment is setup correctly and one of those checks is checking the SchUseStrongCrypto values and notifying if they are not set properly.
After it's installed - you no longer need to worry and the next time you need to import an update, you can just open an Admin PowerShell prompt on the server and run
Import-WsusUpdate -KB KB#
or any of the other parameters available
Get-Help Import-WsusUpdate