Check HASH-256 Laravel

Hi, I have a system that requires a homeowner to submit a form about their guest's details. When they submit a form, each will be assigned a unique 6-digit code. This code will be hashed with SHA-256. In the admin's view, there is a list of all submitted forms. I want to do a search function where when I enter the code, the system will look through the hashed code and check if it exists or not.

This is my GuestController:

public function index()
    {
        //returns admin's view
        $guest = Guest::all();
        return view('pages.guest.index', compact('guest'));
    }
public function store(Request $request)
    {
        $guest = new Guest;
        $guest->code = random_int(100000, 999999);
        $guest->hash = hash('sha256', $guest['code']);  
        $guest->owner_id = Auth::user()->id;
        $guest->owner = Auth::user()->name;
        $guest->unit = Auth::user()->unit;
        $guest->guestname = $request->input('guestname');
        $guest->guestphone = $request->input('guestphone');
        $guest->guestic = $request->input('guestic');
        $guest->guestcar = $request->input('guestcar');
        $guest->numberofguests = $request->input('numberofguests');
        $guest->datevisit = $request->input('datevisit');
        $guest->timevisit = $request->input('timevisit');
        $guest->save();
        
        return redirect('show-pass')->with('status', 'Guest Added Successfully');
    }
public function search(Request $request)
    {
        //Get the search value from the request
        $search = $request->input('search');

        //Search in the code from the list
        $guest = Guest::query()
                ->where('code', 'LIKE', "%{$search}%")
                ->get();
               
        //Return the search view with the results compacted
        return view('pages.guest.search', compact('guest'));

    }

This is my search result blade:

<div class="card-body">
                @if($guest->isNotEmpty())
                        @foreach ($guest as $item)
                            <div class="post-list">          
                                <p>Owner : {{ $item->owner }}</p>
                                <p>Unit : {{ $item->unit }}</p>                 
                                <p>Guest Name : {{ $item->guestname }}</p>
                                <p>Guest Phone Number : {{ $item->guestphone }}</p>
                                <p>Guest IC Number : {{ $item->guestic }}</p>
                                <p>Guest Car Number : {{ $item->guestcar }}</p>
                                <p>Date : {{ $item->datevisit }}</p>
                                <p>Time : {{ $item->timevisit }}</p>
                            </div>
                        @endforeach
                        @else 
                        <div>
                        <h4>No guests with the code was found</h4>
                        </div>
                @endif
             </div>

How can I edit my search method to be able to do so? May I get some help?