tabel relasi tidak dapat memunculkan isi dari tabel

saya ingin menampilkan tabel nilai mahasiswa dimana satu mahasiswa memiliki banyak nilai dari beberapa mata kuliah. Mohon bantuannya

image.png

controller

    public function nilai($Nim)
    {
        $Mahasiswa = Mahasiswa::with('kelas')->where('nim', $Nim)->first();
        $matkul = Mahasiswa_MataKuliah::with('matakuliah')->where('mahasiswa_id', ($Mahasiswa->mahasiswa_id))->get();
            return view('mahasiswa.nilai', ['Mahasiswa' => $Mahasiswa, 'matakuliah' => $matkul]);
    }

models

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Mahasiswa_MataKuliah extends Model
{
    use HasFactory;
    protected $table = 'matakuliah_mahasiswa';
    protected $fillable = ['mahasiswa_id',
                            'matakuliah_id',
                            'nilai',
                        ];

    public function mahasiswa()
    {
        return $this->belongsTo(Mahasiswa::class, 'mahasiswa_id', 'id_mahasiswa');
    }

    public function matakuliah()
    {
        return $this->belongTo(Matakuliah::class, 'matakuliah_id');
    }
}

seeder

<?php

namespace Database\Seeders;

use Illuminate\Database\Seeder;
use Illuminate\Support\Facades\DB;

class MataKuliahSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        $matkul = [
            [   'nama_matkul' => 'Pemrograman Berbasis Objek',
                'sks' => 3,
                'jam' => 6,
                'semester' => 4,
            ],
            [   'nama_matkul' => 'Pemrograman Web Lanjut',
                'sks' => 3,
                'jam' => 6,
                'semester' => 4,
            ],
            [   'nama_matkul' => 'Basis Data Lanjut',
                'sks' => 3,
                'jam' => 4,
                'semester' => 4,
            ],
            [   'nama_matkul' => 'Praktikum Basis Data Lanjut',
                'sks' => 3,
                'jam' => 6,
                'semester' => 4,
            ],
        ];

        DB::table('matakuliah')->insert($matkul);
    }
}

<?php

namespace Database\Seeders;

use Illuminate\Database\Seeder;
use Illuminate\Support\Facades\DB;

class MataKuliahMahasiswaSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        $data = [
            [   'mahasiswa_id' => 1,
                'matakuliah_id' => 1,
                'nilai' => 88
            ],
            [   'mahasiswa_id' => 1,
                'matakuliah_id' => 2,
                'nilai' => 87
            ],
            [   'mahasiswa_id' => 1,
                'matakuliah_id' => 3,
                'nilai' => 86
            ],
            [   'mahasiswa_id' => 1,
                'matakuliah_id' => 4,
                'nilai' => 90
            ],
            [   'mahasiswa_id' => 3,
                'matakuliah_id' => 1,
                'nilai' => 88
            ],
            [   'mahasiswa_id' => 3,
                'matakuliah_id' => 2,
                'nilai' => 93
            ],
            [   'mahasiswa_id' => 3,
                'matakuliah_id' => 3,
                'nilai' => 85
            ],
            [   'mahasiswa_id' => 3,
                'matakuliah_id' => 4,
                'nilai' => 80
            ],
        ];

        DB::table('matakuliah_mahasiswa')->insert($data);
    }
}

blade

@extends('mahasiswa.layout')

@section('content')
    <div class="row">
        <div class="col-lg-12 margin-tb">
            <div class="justify-content-center align-items-center">
                <div class="d-flex justify-content-center mt-2">
                    <h2>JURUSAN TEKNOLOGI INFORMASI</h2>
                </div>
                <div class="d-flex justify-content-center my-4">
                    <h1 class="text-center">KARTU HASIL STUDI (KHS)</h1>
                </div>
            </div>
        </div>
        <div class="text-left">
            <p><b>Nama : </b>{{ $Mahasiswa->nama }}</p>
            <p><b>Nama : </b>{{ $Mahasiswa->nim }}</p>
            <p><b>Nama : </b>{{ $Mahasiswa->kelas->nama_kelas }}</p>
        </div>

        <table class="table table-bordered">
            <tr>
                <th>Mata Kuliah</th>
                <th>SKS</th>
                <th>Semester</th>
                <th>Nilai</th>
            </tr>
            @foreach ($matakuliah as $matkul)
                <tr>
                    <td>{{ $matkul->matakuliah->nama_matkul }}</td>
                    <td>{{ $matkul->matakuliah->sks }}</td>
                    <td>{{ $matkul->matakuliah->semester }}</td>
                    <td>{{ $matkul->nilai }}</td>
                </tr>
            @endforeach
        </table>
        <a class="btn btn-success" href="{{ route('mahasiswa.index') }}">Kembali</a>
    </div>
@endsection