I think it's fair to say that Red Hat simply doesn't care about the desktop--at least beyond internal systems. You could argue the Fedora folks do to some degree but it's just not a priority and really isn't something that matters from a business perspective at all.
Well Red Hat did make a go at a supported enterprise desktop distro for a time and, as I wrote, Fedora--which Red Hat supports in a variety of ways for various purposes--is pretty much my default Linux distro.
So I'm not being critical. Yes, Red Hat employees do contribute to projects that are most relevant to the desktop even if doing so is not generally really the focus of their day jobs. And, no, other companies almost certainly haven't done more.
Off the top of my head System76 jumps to mind with their hardware and Pop!_OS.
> Can you name a company which does care about the linux desktop?
To some extent Valve. They have to, since the Steam Deck's desktop experience depends on the "Linux desktop" being a good experience.
Can you name a company which does care about the linux desktop? Over the years i’m pretty sure redhat contributed a great deal to various desktop projects, can’t think of anyone who contributed more.