These are the 2020 Samsung QLED TVs that support HDMI 2.1, 4K @ 120Hz and eARC - HardwareZone.com.sg
SAMSUNG QE65Q80B 65″ QLED 4K 120Hz Tizen TV Full Array HDMI 2.1 DVB-T2/HEVC/H.265 — Vilonni BV
Amazon.com: Hisense ULED Premium 55U7G QLED Series 55-inch Android 4K Smart TV with Alexa Compatibility, 1000-nit HDR10+, Dolby Vision & Atmos, 120Hz, HDMI 2.1, Game Mode Pro : Everything Else
Amazon.com: 3ft 8K HDMI 2.1 Cable - Ultra HD High Speed 48Gbps 120hz HDMI Cord, Gold Connectors, Nylon Braided, Compatible with Play Station Xbox PS4 Samsung Roku Apple OLED TV : Electronics
Ugreen 8k Hdmi Fiber Optic Cable Hdmi 2.1 Dynamic Hdr 8k/60hz 4k/120hz Ultra High Speed 48gbps Earc 3d Hdcp2.2 For Samsung 8k Tv - Audio & Video Cables - AliExpress