What you are asking is basically for the end-user to run a simulation of a Simulink model in MATLAB, which requires MATLAB and the corresponding licenses. I don't really see an advantage of generating code for this requirement.
I have good experiences with writing a MATLAB App with App Designer to drive a Simulink model, of which you can create an executable file. If you are a bit handy you can make the app perform fairly neat things, which is the closest you can get to having the user controlling a simulation. You can create the executable such that the end-user can use MATLAB Runtime which does not require a license on the end-user side. This is the only recommendation I can give.
