Pods : How to add Custom Admin Table Columns to a Pods ACT

functions.php

<?php

/* 
    only important name is the filter name :
        pods_admin_ui_PODNAME
    if your pods is called "client" then call it
        pods_admin_ui_client
    you can rename all functions to your liking
*/
add_filter( 'pods_admin_ui_PODNAME', 'custom_admin_table_columns_for_PODNAME' );

function custom_admin_table_columns_for_PODNAME ( $ui ) {
    // Adds an admin column called "Info"
    $ui['fields']['manage']['info'] = array(
        'label' => 'Info',
        'sortable' => false,
        'custom_display' => 'admin_column_info_based_on_PODNAME_id' // function that will be called for every row
    );
    
    // Add an admin column called "Info 2"
    $ui['fields']['manage']['info2'] = array(
        'label' => "Info 2",
        'sortable' => false,
        'custom_display' => 'admin_column_info2_based_on_PODNAME_id' // function that will be called for every row
    );

    return $ui;
}

function admin_column_info_based_on_PODNAME_id($row) {
    $results = [];
    /* custom code here */
    $sub = pods( 'other_pod' )->find( null, 1, "some_relationship_id.id='".$row["id"]."'" );
    while ( $sub->fetch() ) {
        $results[] = $sub->field("name");
    }
    /* return valid html */
    return implode("<br />", $results);
}

function admin_column_info2_based_on_PODNAME_id($row) {
    return $row['id'] . " " . $row['name'];
}