Being a privately-held company, Zero keeps its production figures a secret, if they can. Apparently they do have to provide sales numbers for some EU countries like France, due to regulations there. Those numbers will show up now and then. I haven't heard anything so far this year. My guess would be that Zero sales are around 5K a year, but I really have no idea. However, keep in mind that Zero is moving all production, except for the U.S. market, to the Philippians, so that may cut production numbers this year. The bikes assembled in the Philippians will be sold in the rest of the world, other than NA. Bikes destined for NA will still be assembled in Scotts Valley, according to recent forum posts that I have read.
I haven't heard anything about Energica sales.
The LiveWire One sales are likely impacted by the few dealers for the brand and the lack of any promotion of the bikes by H-D that I have seen.