This set certainly DOES have two separate leg length settings. I did this myself today, January 28th, 2021.
It's rather disappointing that Hisense themselves, the rep responding for them here, is in fact incorrect with their answer of no adjustable leg length settings. That's troubling because consumers could turn away from this set on wrong information from Hisense reps right on this page.
My home installers themselves were also mistaken when they installed the wrong leg settings despite the alternative settings being right there in front of them. I use the inside settings for my stand.
I had to correct that and will be reporting to Best Buy.