Order posts by custom field value

order-by-custom-field.txt

1) Create a custom field and attach it to the post type require - https://cl.ly/dc507435d638
2) Add the below code in the active child theme's functions.php file -

add_filter( 'uael_posts_query_args', function( $query, $settings ) {
    // Modify the query here
    $query = array(
    	'meta_key'			=> 'post_order',
		'orderby'			=> 'meta_value',
		'order'				=> 'DESC'
    );
    return $query;
}, 10, 2 );

This code will order the posts according to the value of the custom field.

3) Please replace the 'orderby' value with the the field name and the 'order' with the required order.

@SuryawanshiPrajakta thanks for the solution. But I have a query, let's say if I have the same widget on more than one page then this will modify the query for each page. So is there any way to modify a particular page widget?