Unifaun - Force 250g on all parcels

functions.php

/**
 * @snippet       WooCommerce - Sets Weight on Parcels (Overwrites weight total)
 * @author        Redlight Media AB / Christopher Hedqvist
 * @compatible    WooCommerce 4.4.0
 */
function redlight_unifaun_parcel_weight( $shipment, $order) {
    foreach( $shipment['parcels'] as $i => $parcel ) {
        $shipment['parcels'][$i]['weight'] = 0.250;
    }
    
    return $shipment;
}
add_filter('ac_wc_unifaun_shipment_data', 'redlight_unifaun_parcel_weight', 10, 2 );