Can't pass data from home to results_page by Navigator.push() method

There is a problem with this flutter app, and I cant find the solution as there is no error. what happens is when it navigates from home to the result page, the calculations doesn’t happen or the values are not sent I don’t understand what’s happening here. Any help is much appreciated. here is the link to the git repo

Navigator.push( context, MaterialPageRoute( builder: (context) => ResultsPage( bmiResult: calc.calculateBMI(), resultText: calc.getResult(), interpretation: calc.getInterpretation(), ),

There are no error messages. That is the problem.