Caldera Forms (autopopulate ) & ACF (Field/ Meta)

for functions.php (Child-Theme)

function filter_caldera_forms_autopopulate_post_type_args( $args, $field ) {
        if( 'fld_3126036' === $field[ 'ID' ] ){ // your field ID !!!!
                              
                               $args[ 'meta_query' ] =
                                array(
                                               array(
                                                               'key'                      => 'status', // ACF field name
                                                               'value'   => 'sold', // ACF field value
                                                               'compare' => '!=', // in this case every post is NOT sold
                                               )
                                              
                );
                }
                return $args;
    };    
    // add the filter
    add_filter( 'caldera_forms_autopopulate_post_type_args', 'filter_caldera_forms_autopopulate_post_type_args', 10, 2 );