Generally in Europe, when a card is inserted into a terminal for a chip transaction, PIN entry is required. There is no particular delineation between whether it's credit or debit like this. Contactless transactions have a small percentage chance to request PIN, but contact transactions always do it, as all european cards (AFAICT) have put the PIN CVM ahead of the signature CVM, or just dropped the signature CVM entirely, for around 20 years now.
I wasn't aware that Chip+Signature cards even exist in europe.
Whereas the US is all over the place with different methods for different cards, and mag stripes still in use, sometimes requiring you to enter a PIN alongside that, all largely driven by retailer reticence to update their hardware.