SSH ProxyCommand for windows

I really liked the idea behind the SSH Proxy command from this docs page: SSH ProxyCommand Workflow | Boundary | HashiCorp Developer

Unfortunately, I have to build up a setup with Windows clients where “NC” does not exist. OpenSSH is natively installed since Windows 10.
Did anybody already create a script for windows?

I think either netcat or ncat exists in Windows 10; they should provide essentially the same function as nc on Linux.