Apple TV 4K no Dolby Atmos output option on Samsung TV Q70

Hello,

I am connecting an Apple TV 4K directly to a Samsung TV Q7DR which I'm also connecting a Dolby Atmos compatible Soundbar/Surround (only has one HDMI port for TV connect) set up in the ARC port ... It works perfectly fine with a FireStick 4K connected in other HDMI port... but ATV4K is not even giving me option for Immersive Audio in Audio Format only Change Format... TV only gives me option for PCM only with Dolby Digital and DD+ greyed out. While FireStick4K gives me option for both with Atmos streaming.

Please Help!