This appears to refer to the actual charger itself, not the cable. In the UK (and I presume the rest of Europe), iPhones have only shipped with a USB cable for years. Honestly I can't even remember if they _ever_ shipped with a plug.
The folding uk plug, it was under all the other stuff, I think you may have been throwing it away https://store.apple.com/uk/xc/product/MGRL2B/A
If there wasn't, I would've immediately reported it is damaged goods.