Hi Dimitar,

Please add the custom code below. (How to add custom code? ↗):

add_filter( 'woosb_get_bundles', function ( $bundles, $product_id ) {
	$product = wc_get_product( $product_id );

	if ( is_a( $product, 'WC_Product_Variable' ) && ( $children = $product->get_children() ) ) {
		foreach ( $children as $child ) {
			$sku = get_post_meta( $child, '_sku', true ) ?: 'woosb';

			$query_args = [
				'post_type'      => 'product',
				'post_status'    => 'publish',
				'posts_per_page' => 500,
				'offset'         => 0,
				'tax_query'      => [
					[
						'taxonomy' => 'product_type',
						'field'    => 'slug',
						'terms'    => [ 'woosb' ],
						'operator' => 'IN',
					]
				],
				'meta_query'     => [
					'relation' => 'OR',
					[
						'key'     => 'woosb_ids',
						'value'   => '"' . $child . '"',
						'compare' => 'LIKE',
					],
					[
						'key'     => 'woosb_ids',
						'value'   => '"' . $sku . '"',
						'compare' => 'LIKE',
					]
				]
			];
			$query      = new WP_Query( $query_args );

			if ( $query->have_posts() ) {
				while ( $query->have_posts() ) {
					$query->the_post();

					if ( $_product = wc_get_product( get_the_ID() ) ) {
						$bundles[] = $_product;
					}
				}

				wp_reset_query();
			}
		}
	}

	return $bundles;
}, 99, 2 );

It will find any bundles that contain a variation of the current variable product.