That particular architecture was specifically mentioned in P3477 and cites an article where TI claim they have no intention of updating their C++ standard further. It's under section 2 of the paper. If that has changed recently then it would be very valuable to know, but much of the discussion around this paper was that while some non-8-bit-byte architectures exist, they are permanently on C++98/03 and so there is little point in changing how we design C++26 or C++29 to account for them.