Reddit didn't keep their deadline for the API implementation. I've still got Boost installed and it's still working, nsfw posts however went away yesterday. You can still get nsfw if you use revanced apparently but I'm just checking reddit now out of curiosity.
Perhaps it's not completely implemented everywhere. You can go to r/BoostforReddit if you want to read more about it. Idk and honestly idc either, the whole thing is kind of a shitshow. When Boost stops working without patching I'm out of the reddit ecosystem for good.