OK, got it. The issue was using the wrong driver. The documentation got me a little sidetracked. From the documentation:
"On newer Tizen OS TVs (about 2018 and newer)".
According to Samsung, the Tizen TVs came out starting in 2015.
Six Advantages of Tizen OS on Samsung Smart TVs - Samsung US Newsroom
Samsung doesn't even publicize Tizen much as a feature. I'd suggest renaming the drivers. The current Tizen to something like "Samsung TVs (2015+)", and the other "Samsung TVs (legacy)". Note some drivers on other platforms use the year cutoff as 2016.