Hi Goatman! The soundbar display on the right side will show "Dolby Atmos" when receiving a true Dolby Atmos signal. So that we can assist with the connection, and further troubleshoot the Dolby Atmos sound issue, please reach out to Samsung Audio Support at:
Phone: 1-800-SAMSUNG / Available 8 AM - 9 PM EST, Mon - Fri
LiveChat or Email: https://www.samsung.com/us/support/#contact_us_for_support
We look forward to hearing from you.
^Tim