Connecting Sky Q to Soundbar avoiding lip sync

Just bought a LG soundbar which going to connect through HDMI ARC to TV so can have Prime & Netflix etc on TV apps in Atmos etc. What is the best way to have Sky Q connected to avoid lip sync issues, do I just plug the Sky Q into the TV and let it passthrough the audio to soundbar, would that increase lip sync issue? Or would be best to plug Sky Q into soundbar, would that work? Would soundbar automatically switch between HDMI in and ARC?
 

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