Simple filter to add the 'partial-payment' status from Deposits to the order statuses that get pulled into default WooCommerce reports.

functions.php

<?php // do not copy this line

/**
 * Simple filter to add the 'partial-payment' status to the order statuses that get pulled into
 * default WooCommerce reports.
 * 
 * @param  arr $statuses The original statuses.
 * @return arr           The updated statuses.
 * @link   https://gist.github.com/jessepearson/5b1cb1192488a2b4421bd214ccf17d45
 */
function jp_woocommerce_reports_order_statuses_filter( $statuses ) {

	// If we have an array and 'completed' is in it, we want to add 'partial-payment' as well.
	if ( is_array( $statuses ) && in_array( 'completed', $statuses ) ) {
		$statuses[] = 'partial-payment';
	}
	return $statuses;
}
add_filter( 'woocommerce_reports_order_statuses', 'jp_woocommerce_reports_order_statuses_filter', 10 );