Can someone fake post request code?

I am too curious about these things, if I have vue front connected on some backend for api.

And with vue router beforeEach I send post request to backend where I send within post:

{ route: to.name }

On backend I have array with routes name and type like:

[ 'home' => [ 'type' => 'auth' ] ]

Now I check if post request route is key in this array and if it is not I return response with 404 code.

If it is I check is user auth or not, if it is not I return 403 code

And if route is home and user is auth I return 200 code

On front with axios if I get 200 code I run next(), otherwise I run next() to login page for 403 and next() for 404 with some data to display 404 page instead of blank page.

Now my question would be for 403 code, can someone fake post request response, instead 403 to get 200? Even tho 403 was sent from backend?

Thanks