Here's a proper update from my other “setup” post about the Soundbar (Q90R) being too low and blocked by the top shelf. Got my TV raised and the Soundbar moved up where
Looks like the Samsung HW-Q90R soundbar got updated to have eARC finally (firmware 1010.5). : r/Soundbars
Updating your Sound bar to the latest Firmware update - YouTube
Solved: 1010.5 Firmware Update for hw-Q70R/hw-Q80R/hw-Q90R Soundbars - Samsung Community