Hey everyone, I got a 2021 Sony OLED with 2x HDMI 2.0 and 2x HDMI 2.1

HDMI 2.0 - Empty

HDMI 2.0 - Empty

HDMI 2.1 (eArc) - Soundbar connected

HDMI 2.1 - PS5 connected

I‘m planning on buying an Apple TV 4k, but I don‘t know if it needs to be connected to an HDMI 2.1 or not and if there are any disadvantages/advantages. Anyone mind helping me out? :)