Missing couriers in 'Create fulfilment for fulfilment orders'

I am setting up a scenario that takes a tracking link from Airtable and then creates a fulfilment in Shopify. However the list of couriers in the Shopify action does not match the list in Shopify itself and there are some companies missing that we use.

Shopify can auto detect the courier from the tracking number but it is not always reliable and as this will trigger a customer notification I would prefer to specify the courier to save any customer errors.

Has anyone come across this before? Can you update the list of companies or manually input them? Currently the field is select only in the function.