OpenBrush was imo one of the best apps for it and I wanted to start playing around with the code, but had some friction even getting a build started and eventually lost interest. Installed several SideQuest builds, of course, but after I couldn't get a working distributable with built-in Icosa even all the way into September, I got annoyed and I haven't started the app or looked at the project since.
Just getting the Oculus dev env set up to the half-assed extent I did, it's risky, dubious, and feels bad. I never know which agreement I might accidentally click that'll allow Zuckerberg to Quest2 into my house backwards, or whatever.
I guess this is probably a lot less helpful than I thought it would be when I started typing. Sorry!