Meta Key, Meta Query

Hi deb,

you can change any query parameters as described here by examples: https://www.ads-software.com/plugins/simple-yearly-archive/#how%20can%20i%20change%20query%20parameters%3F

So in order to list only posts with a certain meta_key value, you can try adding the following code snippet to your functions.php (untested)

add_filter( 'sya_get_posts', function() {
    return array(
        'meta_query' => array(
		array(
			'key'     => 'my_meta_key',
			'value'   => array( 1, 2, 3 ),
			'compare' => 'IN'
		)
	)
    );
});

Lemme know if that worked for you. ??