Thanks George! With your help we were able to accomplish what we needed. Here’s what worked for us in case it helps someone else:
add_filter( 'manage_tribe_events_page_tickets-attendees_columns', 'add_my_custom_attendee_column', 20 );
add_filter( 'tribe_events_tickets_attendees_table_column', 'populate_my_custom_attendee_column', 10, 3 );
function add_my_custom_attendee_column( $columns ) {
$columns['custom_id'] = 'Attendee Name';
return $columns;
}
function populate_my_custom_attendee_column( $existing, $item, $column ) {
if ( 'custom_id' !== $column ) return $existing;
$meta_data = get_post_meta( $item['attendee_id'], Tribe__Tickets_Plus__Meta::META_KEY, true );
return esc_html( $meta_data['athletes-name'] );
}