Both Red Hat and Fedora have sponsored KDE also in recent years, FWIW, e.g. the Akademy flagship conference.
But what I really want to say is that Red Hat's contributions to Gnome are not that large recently. I often see comments along the lines of "this should be easy for Gnome, they have Red Hat backing them", and it's really underestimating how self-sufficient the Gnome community is and how many legs it has to stand on, because it's really not "all Red Hat".
I haven't deeply researched the finance, but bottom of https://www.gnome.org/ says Hosted by Red Hat, and Red Hat's logo is on the carousel of GNOME supporters. Meanwhile on the end of https://kde.org/ home page there's a list of patrons which have SUSE and Canonical but not Red Hat.
Yup, but you'll also find e.g. Fedora on lists like https://akademy.kde.org/2022/sponsors/ (and Red Hat was on there not so long ago too, iirc) so it's not completely out of the blue that the communities are involved with each other :-)
