But that was exactly one of the benefits of dvd-a; there was room for MPL AND DD or DTS. They were fully compatible with any dvd player; though you couldn't get lossless without DVD-A capability, you could still get surround.
I think the issue might be software-related. At the consumer level, it's nearly impossible to burn a DVD-A nowadays: Minnetonka DiscWelder and Cirlinca HD Audio Solo lost support ages ago and became 'abandonware'. There's actually an ongoing thread here about people struggling to keep the Cirlinca program alive on newer operating systems.This.
Perhaps the same is true at the professional level--whatever authoring house Esoteric is using to make these discs may have stopped licensing the proper software years ago, or maybe it stopped running once they upgraded to a certain OS (kind of like how Pro Tools stopped supporting .mov files after the upgrade to Catalina).