I think the Chinese ebikes had the hardest hit because of Covid 19.
It's been reported a while back that Bafang (motor supplier for Rad, Juiced, etc.) had to cease the production due to Covid 19.
Supply bottlenecks, limited choice, empty stores – is this what the next few months or even the year will look like? With many production facilities across China falling silent, we’ve consulted the experts to find out what sort of an impact the virus may have on the industry. It has been met...
ebike-mtb.com
Unfortunately, I don't think anyone has a specific insight, because your question is related to when will pandemic end?
I think all you can do is to wait and see what happens?
If you want a bike now, it's above your budget, but if you're willing to go up to $2,399, there's Yamaha CrossCore.
I'm sure there are other alternatives too if you're willing to go up a little higher.
Yamaha e-bikes enable more roads and trails bicycle riding. Cutting edge electric bike motors, reliable, long-lasting batteries and intuitive controls make Yamaha e bikes the perfect do-more ride. Yamahabicycles.com
www.yamahabicycles.com
That said, I'm sure some Yamaha parts are made in China so I don't know how long their stock will last.
I recommend Yamaha because they have a solid reputation with 3 year warranty, and their price is (generally) cheaper than Trek or Specialized counterpart.
But I don't even know what kind of bike you're looking for.. fat bike, step through, commuter, etc?