I just put out a beta release of The Ultimate Unicorn Mod for Minecraft 1.16.4!
Since converting over from 1.15 to 1.16 was a lot easier than the conversion process from 1.12 to 1.15, the new beta release has pretty much all the features (mostly just missing jousting and spirit trees).
You can get it from our download page here or from CurseForge here.