add_filter( 'get_job_listings_query_args', function( $args ) {
    $args['meta_query'][] = [
        'relation' => 'OR',
        [
            'key' => '_job_date',
            'value' => date('Y-m-d'),
            'compare' => '>=',
            'type' => 'DATE',
        ],
        [
            'key' => '_job_date',
            'value' => '',
        ],
        [
            'key' => '_job_date',
            'compare' => 'NOT EXISTS',
        ],
    ];

    return $args;
}, 100 );
add_filter( 'mylisting\sections\listing-feed\args', function( $args ) {
    $args['meta_query'][] = [
        'relation' => 'OR',
        [
            'key' => '_job_date',
            'value' => date('Y-m-d'),
            'compare' => '>=',
            'type' => 'DATE',
        ],
        [
            'key' => '_job_date',
            'value' => '',
        ],
        [
            'key' => '_job_date',
            'compare' => 'NOT EXISTS',
        ],
    ];

    return $args;
} );