The link you linked confirms what I already pointed out in another subthread. NNUE was invented by Yu Nasu for the game of Shogi. It bears very little resemblance to the AZ neural net. It's much more shallow, and inspired by work that pre-exists AZ, from the computer Shogi community. The way it trains is different, inference is different. The only commonality is the fact it's a neural net. But neural nets have been used for chess before in various capacities; Deepmind didn't invent this. All they did was throw a bunch of compute at it and do a big PR stunt then walk away.

I'm not sure where you get the LCZero connection from.