Yeah, via SideQuest (which is a sideloader program), and most game engine support quest development. However it wouldn't surprise me if Meta were able to prevent that.
They really are horrible to devs, they offer no real support, especially for Unreal devs, and their dev forums are practically dead because of this.
They don't understand how to encourage devs. I was thinking of getting a Meta Quest 3, but seeing this post has me reconsidering the idea.
I can't speak for the quest directly but I've used programs like sidequest to load homebrew games onto my quest 2. It's also really easy to do so I don't think they're quote going to be e waste yet
Dunno how much enthusiasm there is for a homebrew scene because the 1st gen was weak as shit, and the main selling point is you can use them as a PC headset, which is going to get you a better experience than any game run natively on it.