Sending data from one page Form to second page form to third where submit data

Hi, I need to send data from one page form(1 input) > in Page 2 (Add more info in inputs and text area) > page 3 (Preview & Submit).

First page user submit a url in an input

Second page user submit the url(picked from first page) related information like Title, Description, Selects a category, add tags etc. All in inputs and textarea.

Third page for final view of submitted information so far and submit it into the DB.

But the second page won't go to third page it gives 404 error.

Routes Code

Route::get('/submit', 'SubmitLinks@index')->middleware('auth');
Route::post('/submit2', 'SubmitLinks@submitUrl')->middleware('auth');
Route::post('/submit3', 'SubmitLinks@submitData')->middleware('auth');

Controller Code

namespace App\Http\Controllers;
use DB;
use App\Category; 
use Illuminate\Http\Request;

class SubmitLinks extends Controller
{
     public function __construct()
    {
        $this->middleware('auth');
    }
    
    public function index() {
        return view('submit');
        $link = $request->input('link');
        $request->session()->put('link',$link);
   }
    /**
     * Submit a new Url.
     *
     * @param  Request  $request
     * @return Response
     */
    public function submitUrl(Request $request)
    {
        
        $categories = DB::table('categories')->get();
        $validatedData = $request->validate([
            'link' => 'required|unique:links|min:5|active_url',
        ]);
        
        $link = $request->session()->get('link');
        
        $title = $request->input('title');
        $category = $request->input('category');
        $description = $request->input('description');
        $tags = $request->input('tags');
        
        $request->session()->put('title',$title);
        $request->session()->put('category',$category);
        $request->session()->put('description',$description);
        $request->session()->put('tags',$tags);
            return view('submit2')->with('categories', $categories)->with('link', $link);
    }

    public function submitData(Request $request)
    {
        $validatedData = $request->validate([
            'title' => 'required|between:15,150',
            'category' => 'required',
            'description' => 'required|between:250,500',
            'tags' => ['required'],
        ]);

        $link = $request->session()->get('link');
        $title = $request->session()->get('title');
        $category = $request->session()->get('category');
        $description = $request->session()->get('description');
        $tags = $request->session()->get('tags');
        return view('submit3');    
    }

Both first and second pages have forms with Post method

First Page
<form action="submit2" method="post" >
@csrf
<input type="text" name="link">
</form>

Second page
<form action="submit3" method="post" >
@csrf
<input type="text" name="title" value="{{ old('title') }}>
<select class="form-control" id="category">
<option value="">Select a Category</option>
*
*
*
</select>
<input type="text" name="tags" value="{{ old('tag') }}>
<textarea name="description">{{ old('description') }}</textarea>
<input type="hidden" name="url" value="{{$link}}">
</form>

I am also trying to get data with session but it still giving the same 404 error or if I change the route to get from post the error I get is.

The POST method is not supported for this route. Supported methods: GET, HEAD. What should be done?