The “so also” means in exactly this way.
So now go look at the comparison. The king forgave the servant who owed a large debt (vs27). Then when that servant was unforgiving toward another servant over a small debt, the king reminded him “I forgave you…should you not have forgiven.” (32) Then the king delivered him to the tormenters TILL HE SHOULD PAY ALL THAT WAS DUE.” (34). In other words, the king unforgave the debt!
“So also shall your heavenly Father do to you if you forgive not.” How do you read it --
Can God Unforgive sins? Does he??