popkorn95

The tools for Microsoft Store/Game Pass, Steam, GOG, and potentially other game versions remove black bars from the game at 48:9 and wider, also correcting the vertical field of view at 21:9 and wider to match that of 16:9.
Unpack the archives with software like 7zip or PeaZip using the password pcgw Launch the game and set Panini Projection to off in Advanced Display settings. Launch the trainer and press the button as instructed. All trainers containing CE components may trigger some anti-virus software.
You can buy me a coffee or become a patron.
 

Note: A standalone solution for the Director's Cut edition is now available.

The tools allow for support of any display aspect ratio and real-time FOV adjustment in Death Stranding. The gameplay and engine-rendered cutscenes will properly fill the screen, while the state of the pre-rendered cutscenes will depend on the used solution.

Option 1:
A trainer automatically detecting any resolution and allowing to make the zoomed pre-rendered cutscenes 16:9. Left alignment of the pre-rendered cutscenes is a known issue. The tool also allows to adjust FOV at any aspect ratio.
Unpack the archive - the password is pcgw Launch the game, followed by the trainer Press the desired keys - ideally from the main menu and before any cutscenes Go to Graphics Settings and select your resolution under 21:9
Correcting the aspect ratio may require switching to 16:9 in Graphics Settings, then back to 21:9. Option 2:
The known ultrawide solution made into patchers limited to common wide resolutions and keeping the pre-rendered cutscenes zoomed.

Tested on the latest Steam version at 1920x1080, 2560x1080, 3440x1440, 3840x1080 and 5760x1080 (HUD is spanned).

I may have been the first to discover the common sense aspect ratio change solution (as seen on the WSGF Discord), but I am certainly not the one who published the bytes first (looks like it was FasterThanFTL). As such, I am not taking any credit for the patchers but you can buy me a coffee or support me on Patreon for the trainer built over many hours of 100% unique research, calculations and code.