I can understand that it doesn't support UW completely on cutscenes or dialogs, there are plenty of games that do not, mostly because cutscenes were designed with a different aspect ration in mind and odd things may appear because of the cutscenes scripting, I'm ok with it, it's sad but ok.
However, during the actual gameplay I'm expecting at least that is supported, and that I can make full use of my screen without having the imaged cropped (which makes things appear bigger than they should, or actually having a field of view smaller than a 16:9. I also expect that in the event that 21:9 is not supported (or other UW resolutions), 16:9 works without having to go through manual configuration on ini files or creating custom resolutions on my graphic drivers (even though many 16:9 resolutions are available to be picked in game) or changing other weird settings. That for me is real bug and needs to be fixed asap before any kind of UW support and along with the very first bug fix delivery.
It's not the UW support that makes me put this game to the side and risk it simply being forgotten (thanks game pass), but still something I keep in mind from the same companies in case I actually think on buying, because other things come next and they work.
The extra hurdles I would need to go through to actually play the game without it being stretched or cropped, it's something I completely refuse to do. It has to work at least that.