Optimising conditional code for WordPress

There are two types of pages I am interested in for WordPress: pages and posts.

At the top of my posts template, I have some code as following to display varying banner ads:

<?php if ( ! is_single() && ! is_search() && ! is_category() && ! is_tag() && my_wp_is_mobile() ) {?>
ad code
<?php } ?>

<?php if ( is_single() && my_wp_is_mobile() ) {?>
ad code
<?php } ?>


<?php if ( ! is_single() && ! is_search() && ! is_category() && ! is_tag() && ! my_wp_is_mobile() ) {?>
ad code
<?php } ?>

<?php if ( is_single() && ! my_wp_is_mobile() ) {?>
ad code
<?php } ?>

At the top of my pages template, I have some code as following to display varying banner ads:

<?php if ( is_page(1302) && ! my_wp_is_mobile() ) {?>
ad code
<?php } ?>

<?php if ( is_page(3651) && ! my_wp_is_mobile() ) {?>
ad code
<?php } ?>

<?php if ( is_page(602) && ! my_wp_is_mobile() ) {?>
ad code
<?php } ?>

<?php if ( ! is_front_page() && ! is_page(array(602,3651,1302)) && ! my_wp_is_mobile() ) {?>
ad code
<?php } ?>

<?php if ( is_front_page() && ! my_wp_is_mobile() ) {?>
ad code
<?php } ?>


<?php if ( is_page(1302) && my_wp_is_mobile() ) {?>
ad code
<?php } ?>

<?php if ( is_page(3651) && my_wp_is_mobile() ) {?>
ad code
<?php } ?>

<?php if ( is_page(602) && my_wp_is_mobile() ) {?>
ad code
<?php } ?>

<?php if ( ! is_front_page() && ! is_page(array(602,3651,1302)) && my_wp_is_mobile() ) {?>
ad code
<?php } ?>

All the “ad codes” are different. I would like to move the banner ad to a different place in my theme and have been trying something like:

<?php
    if ( is_single() ) {
        get_template_part( 'postads' );
    }
?>

OR

<?php
    if ( is_single() ) {
require("postads.php");
    }
?>

With postads.php being a file in my child theme and containing the relevant banner code and conditions as above.

I’ve been trying both php include and get_template_part to no avail – it simply won’t show up (site loads, no ad code).

Does anyone have any ideas on how to neatly optimise this code? I am sure there is a better way!