The UE65KS9500 supports Wi-Fi. Most of the other 4K and 8K TVs that have been available for around the same time as this TV also support Wi-Fi.
It may also be worth considering one of the alternative TVs which support Wi-Fi currently available including because of its better review score, the LG OLED55E6 (£1,999).
It is worth also looking at other televisions which also support Wi-Fi including the Sony KD-55XE9305 (£2,395).
What is Wi-Fi?