How to show all the associated posts with specific date of data metabox?

If I’ve understood the case correctly your $args should be something like that:

$args          = array(
                'posts_per_page' => 5, // what ever you like
                'paged'          => $page, // page number tracker
                'post_type'      => 'post', // or change to custom
                'post_status'    => array( 'draft', 'publish' ),
                'meta_query'     => array(
                     array(
                         'meta-key'     => 'pb_match_date',
                         'meta-compare' => 'EXISTS'
                      ),
                 ),
            );

This will return all posts where ‘pb_match_date’ exists, then you can extract the value and build upon.

You can always reference the codex for more details:

https://codex.wordpress.org/Class_Reference/WP_Query

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