WC Shipment Tracking provider customisation example..php

/**
 * wc_shipment_tracking_add_custom_provider
 *
 * Adds custom provider to shipment tracking
 * Change the country name, the provider name, and the URL (it must include the %1$s)
 * Add one provider per line
*/

add_filter( 'wc_shipment_tracking_get_providers' , 'wc_shipment_tracking_better_hermes' );

function wc_shipment_tracking_better_hermes( $providers ) {
	
	$providers['Germany']['Hermes'] = 'https://new.myhermes.co.uk/track.html#/parcel/%1$s/details';
	return $providers;
	
}