I had no idea fairings were the hard part of motorcycle design.
They might require some expensive wind tunnel time to make sure that they are stable at all speeds and the production molds are also expensive.
It also requires heavyweight computer modeling of air flows, which done by aerodynamics experts; Zero presumably doesn't have any on staff and doesn't want to hire them fulltime for a project or two, but surely they could cooperate with someone who does have the expertise -- I'm puzzled they haven't done that yet. Sure, the fairings would be expensive but it would (IMHO) expand the market significantly. Maybe they're waiting for 5-digit annual sales...
If they ever see 5-digit sales, one of the Japanese motorcycle companies will be knocking on their door to either buy the business or some of their tech. Right now Honda is planning to enter the electric scooter market with a 50cc-class step-through within a couple of years, according to an article that I just read.
Yes, interesting to speculate whether the big brands might up having "buy rather than self-develop" approaches.
Anyway, Yamaha's apparently going to start sooner, with a
swappable-battery scooter in Taiwan this summer (it was co-developed with Gogoro). All the Big Four are part of a partnership aimed at reaching a standard for swappables; I wonder if it's something that might be suitable for e-motorcycles as well, though I suspect it might not be.
That said, I expect that at least a few of the top 10 makers have internal development projects going on, for basic prototypes, just to be ready if/when an electric revolution comes along. I can see ICE scooters being outlawed in some European cities, as has happened in China.