After the HW-Q90r eARC update, I did a little digging in the firmware files. Is there a reason that the HW-N950 didn't get eARC - Page 4 - Samsung Community
How to update your Soundbar using the SmartThings app | Samsung UK
Solved: 1012.6 Firmware Update for hw-Q90R Soundbar - Samsung Community
Solved: 1010.5 Firmware Update for hw-Q70R/hw-Q80R/hw-Q90R Soundbars - Samsung Community
HW-Q90R Samsung | Harman/Kardon 7.1.4ch Soundbar with Dolby Atmos Home Theater - HW-Q90R/ZA | Samsung US
HW-Q90R Samsung | Harman/Kardon 7.1.4ch Soundbar with Dolby Atmos Home Theater - HW-Q90R/ZA | Samsung US
Looks like the Samsung HW-Q90R soundbar got updated to have eARC finally ( firmware 1010.5). : r/Soundbars