Red Hat hasn't been dominant in Wayland for years. It's very much a community effort, including governance and maintainership.
systemd is currently mostly developed by employees of Microsoft, Meta and Suse, aside from I guess Frantisek.
Red Hat does a lot, and I'm sure they have thoughts about where they spend their money, but I don't think people really understand how decoupled these projects and communities are.
Like I genuinely don't think Gnome or systemd or Fedora would just use a ubuntu/canonical-built core system even if it was superior in every way
And hey I'm not complaining, I use systemd (indirectly) and gnome almost everyday. I don't care where the software comes from, really, I'm just glad I can use it. But that doesn't mean we can't be aware of the power dynamics around it :)
It was significantly better than sysvinit and Debian, Fedora, RHEL6, OpenSUSE all adopted it. Even though it came out of Canonical.
It was replaced by Systemd because that did concurrency in the dependency management, which Upstart didn't, and was never designed to do, so was going to require a lot of rework to support.
I work with enterprise customers every day who use RHEL, it's free variants, and Ubuntu - I can promise that none of them give a single shit about Flatpak or Snap. They will never use either of them. Those tools are only relevant to Linux on the desktop - the small size of that market is exactly why both companies (mostly Canonical) have gotten away with being a nuisance on this front.