xmlsf_entry_url

apply_filters( 'xmlsf_entry_url', string[] $url , string[] $sitemap, obj[] $object )

function my_tax_term_entry_exclusion( $url, $sitemap, $object ) {
	// Skip if not in taxonomy sitemap context.
	if (  'taxonomy' !== $sitemap ) {
		return $url;
	}

	// In a taxonomy sitemap context, our $object is a WP_Term object.
    // Exclude term by ID.
    $term_ids = array( 9, 123,  556 ) ;
    if ( in_array( $object->term_id,  $term_ids ) ) {
        return false;
    }

	// Return original URL.
	return $url;
}
add_filter( 'xmlsf_entry_url', 'my_tax_term_entry_exclusion', 10, 3 );