New TV with Dolby Atmos: Receiver needed?

I plan to buy a new TV, the LG Oled 65C9. I would like to have a Dolby Atmos soundbar, e.g. Following: Samsumg HW-Q90R. Can you recommend this combination? I would also like to connect a Playstation and an AppleTV. How does it work with the connections? Come all HDMI cables (console & AppleTV) in the TV and a cable in the Sounbar? Or does it need a receiver for this, so that works with the Atmos sound?

First of all: I know that there are much better sound systems with Atmos, but I do not want to build a Home Cinema with large speakers, etc., but a simple, space and cost-efficient solution, but still makes a difference to the built-in TV speakers

The soundbar has 3 HDMI ports, an HDMI ARC input, you can connect 2 devices via HDMI directly to the soundbar and connect the TV via HDMI ARC with the soundbar, that would be the best connection.

The soundbar is already very good

https://www.computerbild.de/...99395.html

same with the TV

https://www.computerbild.de/...11825.html

a receiver is not necessary in the, has tuners for all reception routes

Thanks for the star, greeting andie