A recent update added the option to maintain vertical aspect ratio, doesn't this mean that the game has Hor+ support if this option is enabled?
Topic on Talk:Satisfactory
Captcha will not let me post a link to the update directly, so here is a broken link: store(dot)steampowered(dot)com/news/app/526870/view/2915480922472881362
I've updated the site so hopefully the wiki should allow you to post the link directly again without requiring captcha.