How can I tell that EFN is active?

Hi all,
Sorry if this has been asked before. I’m a little perplexed. We were trialling PAN-EU, but it was proving too much of a hassle to ship from the UK to a fulfilment centre in the EU without it costing the earth so we’re switching to EFN.

How can I tell that it’s actually working? I’ve enabled EFN from the PAN-EU page in my inventory but I’m not sure if there’s any additional steps i should be taking

Any help would be great
Thankyou