We ended up with a Samsung fridge in our new home. It has no external display or any other indication that it is a "smart" fridge. I only found out when a friend visited who has a Samsung phone and the phone offered to connect to the fridge. We spent the next 30 minutes removing panels from the fridge and found the wifi/bluetooth antenna on a small board under the top-right hinge cover. The board was disconnected and the fridge continues to operate normally.
I am now eyeing my dishwasher very suspiciously.