Add this as a small MU-plugin or in your theme/plugin (so updates won’t overwrite it):

functions.php

/**
 * WC Vendors Pro: clean up shipping label and avoid "Vendor Shipping".
 */

add_filter( 'wcvendors_pro_shipping_label', function( $label, $vendor_id, $rate ) {
	// Change this if you want a different default.
	$fallback_method = 'Standard Shipping';

	$vendor_term = function_exists( 'wcv_get_vendor_name' ) ? wcv_get_vendor_name( true, true ) : 'Vendor';

	// 1) Remove the duplicated " Shipping - " part.
	$label = preg_replace( '/\s+Shipping\s*[-–—]\s*/u', ' ', (string) $label );

	// 2) Replace "{VendorTerm} Shipping" with your desired method name.
	$label = preg_replace(
		'/\b' . preg_quote( $vendor_term, '/' ) . '\s+Shipping\b/i',
		$fallback_method,
		$label
	);

	// 3) Normalize whitespace.
	$label = trim( preg_replace( '/\s{2,}/', ' ', $label ) );

	return $label;
}, 10, 3 );

add_filter( 'woocommerce_order_shipping_method', function( $method, $order ) {
	if ( ! is_a( $order, 'WC_Order' ) ) {
		return $method;
	}

	// Only apply this display tweak if the order used WC Vendors Pro shipping.
	$has_wcv_pro_shipping = false;
	foreach ( $order->get_items( 'shipping' ) as $item ) {
		if ( is_a( $item, 'WC_Order_Item_Shipping' ) && 'wcv_pro_vendor_shipping' === $item->get_method_id() ) {
			$has_wcv_pro_shipping = true;
			break;
		}
	}
	if ( ! $has_wcv_pro_shipping ) {
		return $method;
	}

	$fallback_method = 'Standard Shipping';
	$vendor_term     = function_exists( 'wcv_get_vendor_name' ) ? wcv_get_vendor_name( true, true ) : 'Vendor';

	$method = preg_replace( '/\s+Shipping\s*[-–—]\s*/u', ' ', (string) $method );
	$method = preg_replace(
		'/\b' . preg_quote( $vendor_term, '/' ) . '\s+Shipping\b/i',
		$fallback_method,
		$method
	);

	return trim( preg_replace( '/\s{2,}/', ' ', $method ) );
}, 10, 2 );