People really need to read the U.S. Constitution. It says, “All legislative Powers herein granted shall be vested in a Congress of the United States.”
The Constitution makes no reference whatever to executive orders (EO). George Washington started the practice mostly because he had to. Traditionally executive orders have been treated by Congress as having the legal status of legislation, but only insofar as they apply to the management of how the government operates.
The Constitution makes it quite clear that the President has no power to enact laws, but as long as an EO does not unilaterally alter or negate existing legislation or run counter to the Constitution Congress usually accords it legitimacy. Those that do not honor the separation of powers have been struck down by the courts or by legislation that opposed them.