Duplicate Store Pickup Module

Hi All,

I'm hoping you can help? I have duplicated the Instore pickup extension in Opencart 3.0.33 by duplicating these files:

ADMIN
controller/extension/shipping/pickup.php
view/template/extension/shipping/pickup.twig
language/language/en-gb/extension/shipping/pickup.php
CATALOG
model/extension/shipping/pickup.php
language/en-gb/extension/shipping/pickup.php

I have then renamed them for example pickup_cavan.php and changed every reference to pickup in them to pickup_cavan with the exception of the Model and Controller Method declarations.

It is loading 100% in the admin, I can enable it, however it is not appearing as a shipping option in the frontend.

Does anyone know why this might be? It is an exact replica of pickup.php and that is appearing in the frontend.

Thanks,
Brian.

the Frontend
catalog/controller/extension/total/shipping/whatever-name.php
or one (or both) of the
catalog/controller/checkout/ ...
shipping-related files seem to be still missing, as it looks.
And even the API Subdir has a shipping-related file:
catalog/controller/api/ ...