That's a pretty decent list, I actually can't remember many more, maybe I'd add Onedev, but I've been skeptical about it since it's gone more corporate, so idk.
Actually, are these 2 forks of another, when?
To be fair, the meme isn't exactly accurate, because the forking relationship is this:
Gogs
└ Gitea
└ Forgejo
But the colors just fit too good not to use this meme, so there you go lol