Increase the number of orders shown on the Orders page in My Acccount within WooCommerce

functions.php

/**
 * Increase the number of orders shown on the Orders page in My Acccount
 */
function mytheme_my_account_orders( $args ) {
	// Use -1 to display all orders
	$args['posts_per_page'] = 20;
	return $args;
}
add_filter( 'woocommerce_my_account_my_orders_query', 'mytheme_my_account_orders', 10, 1 );