Question about Samsung QE65Q90R

I have no experience of the compatibility of this TV with the soundbar in question. But I do have experience with this TV and the connection of the older soundbar HW-Q80R, which can also output Dolby Atoms. The first thing to note is that Samsung generally had a synchronicity problem via HDMI-ARC. I hope they've got that under control by now. I couldn't connect the soundbar via HDMI-Arc because the sound was always behind the picture, which can't be fixed. Another thing to note about this TV is that it doesn't have an HDMI-eArc connection and therefore can't loop through larger sound formats like Dolby Atmos. So if you want Dolby Atmos, you have to connect your Apple TV directly to the soundbar.