Patched Sync for Reddit still works, but using Relay for Reddit now tells me to use the official app to browse mature content.
A couple of notes: being a mod does work around this block. It also appears that reddit is blacklisting NSFW from an explicitly defined list of client ids, meaning Revanced-patched apps are not affected at all and you don't have to be a mod.
I left Reddit just ahead of the blackout, and I've only been returning for one small private sub that can't effectively be moved. I figure, since it's private, Reddit doesn't get much credit for my activity there.
I've used Relay exclusively for many years, so I've been happy that it's continued to work. It will be annoying if/when I have to use the browser to go to that sub.