Nether Update Plus is a forge 1.16.5 mod that adds on to the minecraft 1.16 nether update, currently it is in a very early beta, but it does have a few features. From new ores, to new nether bricks, there may not be much right now but we plan to add alot in the future, including new biomes, a new boss, all sorts of things, so stay tuned for that ;)
Here is an image taken on day 9 of creating the mod (it is also the current alpha)