SOLVED: Custom bi-directional relationship query

How To
1

Does anyone know how to write a customer bi-directional relationship query?

I want to query associated reviews for items in my cart on the checkout page. This is not working

$product_ids = [];

foreach ( WC()->cart->get_cart() as $item ) {
    $product_ids[] = $item['product_id'];
}

if ( empty( $product_ids ) ) {
    return null;
}

return new WP_Query([
    'post_type' => 'review',
    'posts_per_page' => -1,
    'meta_query' => [
        [
            'key' => 'reviews_to_products', // ACF relationship field
            'value' => array_map('strval', $product_ids),
            'compare' => 'IN',
        ]
    ]
]);
2

Paying it forward as @itchycode was so kind as to help me out with this:

This assumes you know how to get the product ID; above shows one way how get them all. Add code to select the product you want.

$meta_query = [
    [
        'key'     => 'review_to_product',
        'value'   => $product_id,
        'compare' => 'LIKE'
    ]
];

return [
    'post_type'      => 'review',
    'posts_per_page' => 1, // Limit to one review
    'orderby'        => 'rand', // Randomize the review selection
    'meta_query'     => [
        'relation' => 'OR',
        $meta_query
    ]
];