Combine 2 data variable in Laravel

How can i combine 2 variable data in Laravel. Im trying combine data in $income1 and $income2 become $income data show all data from $income1 and $income2

Here my controller

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Collection;

use App\Product;
use App\Blok;

class ProductController extends Controller
{
    public function income()
    {
    $products = Product::all();
    $income1 = \App\Pembelian::join('debitur','debitur.id','=','pembelian.debiturID')
    ->join('blok','blok.blok_id', '=', 'debitur.blokID')
    ->join('products','products.id', '=', 'blok.productID')
    ->get();

    $income2 = \App\Pembayaran::join('angsuran','angsuran.id','=','pembayaran.angsurID')
    ->join('debitur','debitur.id','=','angsuran.debiturID')
    ->join('blok','blok.blok_id', '=', 'debitur.blokID')
    ->join('products','products.id', '=', 'blok.productID')
    ->get();

    $income = collect($income1, $income2);

    $income->all();


    return view('income', compact('products', 'income'));
}
}

But it end up only showing $income1 data. Anyone can help me?