Greetings,
I am trying to implement a way to ship our Klarna payments upon changing an order to a custom status in the most streamlined way possible, which has made me familiar with the plugin code.
The current implementation has an action hook to woocommerce_order_status_complete which is straightforward. The function for that call however requires an initialized Modularity package which is booted and ready as it has in-class calls and one cannot simply add a hook for woocommerce_order_status_fulfilled with a newly constructed PaymentModule class.

Is there a simple way to initialize the package with its containers and then pass the instance along with the method to the add_action() ?

One proper way would be writing a custom module to pass to the initialize() function's filter but that seems an overkill and in breach of the DRY principle.

A more hacky way would be hooking to the .ready hooks of the inpsyde booter and passing the container as a global for the status change action but my attempts at that show little promise.

Any hints are appreciated.

Regards,
Daniel