gistfile1.txt

add_action( 'elementor/query/onmarketpropertyquery', 'remove_sold_from_elementor_query', 99 );
function remove_sold_from_elementor_query( $query )
{
    $tax_query = $query->get('tax_query');
    
    $tax_query[] = array(
        'taxonomy'  => 'availability',
        'terms' => array(15),
        'operator' => 'NOT IN',
    );
    
    $query->set( 'tax_query', $tax_query );
}