How do I order records not matched in leftJoin? - mysql

Question

I'm new to Laravel and having a problem returning my results from this query in the correct order. I have a $products variable that contains both "A" and "B" type of products.
I'm doing a leftJoin with a match_products table to order the records by match_products.sku, but only "B" records are contained in that table.
$products = $products->with(['matches' => function ($quer) use ($business) {
$quer->where('user_id', $business->user_id)->with('skuDiscount');
}])->withCount(['variations' => function ($q) use ($business) {
$q->whereHas('seller_variations', function ($qu) use ($business) {
$qu->where('user_id', $business->user_id);
});
}])->leftJoin('match_products', function ($join) use ($business) {
$join->on('products.id', '=', 'match_products.product_id')
->where('match_products.user_id', '=', $business->user_id);
})
->orderBy('match_products.sku', $order)
->select('products.*')
->limit($perPage)
->offset($perPage * ($page - 1))
->get();
return response()->json(['products' => $products, 'productsCount' => $productsCount]);
My results are coming out:
A records
B records (in order by Sku)
but I need them to be the opposite:
B records (in order by Sku)
A records
I assume this is because the leftJoin is returning the matched records after the non-matched records but I need to return them before the non-matched records. I'd appreciate any help someone could please give me.