A simple and quick example of how to use filter hooks to customize the registration checkout display under the "Name and Description" column. Event Espresso 4.

line_item_display_spco.php

<?php
//* Please do NOT include the opening php tag, except of course if you're starting with a blank file

add_filter(
    'FHEE__EE_Default_Line_Item_Display_Strategy__item_row__name',
    function($name, $line_item) { 
        return $line_item->ticket_event_name() . '<br>'; 
    },
    10,
    2
);

add_filter(
    'FHEE__EE_Default_Line_Item_Display_Strategy__item_row__desc',
    function($desc, $line_item) { 
        return $line_item->name(); 
    },
    10,
    2
);