To connect a PS5 to a TV, plug the included HDMI 2.1 cable from the console into an HDMI 2.1 port on your TV. For 4K 120Hz gaming, the TV port must support HDMI 2.1 — enable 4K 120Hz and VRR in the TV's settings, then confirm output in the PS5's video settings.
Connection Methods
HDMI 2.1 Cable 🔌 Wired
Use the HDMI 2.1 cable included with the PS5.
Plug it into a TV HDMI port that supports 2.1 (often labeled).
On the TV, enable 4K 120Hz / Enhanced HDMI mode for that port.
On PS5: Settings → Screen and Video → confirm resolution and 120Hz.