Route::has(‘login’) basically checks in the routes list if a route with a name ‘login’ exists. If it does it returns true, otherwise it returns false.

If you check on routes/auth.php you would see this code on the file

Route::get(‘login’, [AuthenticatedSessionController::class, ‘create’])

This means with a fresh installation of Laravel Breeze, this named route is made by default so that if statement would return true.