If you refer to any effort by Congress to determine the MEANING OF A PHRASE, then what you’re saying is that the Constitution is a living document. Really believe that? Or only when it suits you?
One of the ways that legal scholars try to figure out the original intent of the constitution is to look at how that phrase was used in other documents from the same time period. Even better is other documents from the same time period that are written by many of the same authors. The only significance of the 1790 act is that it was written just a few years after the constitution was ratified and it had many of the same authors.
So, if the congress of 1790 which included many drafters of the constitution thought that children born to U.S. citizens outside the U.S. could be considered natural born citizens. Then it is likely that many of them had a similar view of what a natural born citizen was when they included the term in the constitution.