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.
Unless you're a mod of a nsfw subreddit, apparently. ๐
https://teddit.net/r/RelayForReddit/comments/14rsirv/how_to_get_around_the_nsfw_filter/