Toolbox for WC Subscriptions: Add this to theme functions file to allow manual renewal payment gateways to skip and set date.

functions.php

<?php

/**
 * Remove the check for if a payment gateway supports "Date change"
 */
remove_filter( 'wcs_view_subscription_actions', 'Javorszky\\Toolbox\\remove_actions', 20 );
/**
 * Allow date changes on subscriptions that are manual
 * @param $subscription
 * @return string
 */
function sp_allow_manual_date_change( $subscription ) {
	return 'yes';
}
add_filter('jgtb_allow_edit_date_for_subscription', 'sp_allow_manual_date_change', 50 );