Production number is usually sent within an hour of placing the order or maximum the next day. If you didn't get it yet, you may want to contact your dealer and see what they have to say. I am guessing this could be due to some delay in the production because of all the things going on worldwide.
I believe other, more experienced members here may want to give their expert opinion on this too.
My order status says "047 - Spec Released-no quota". Sales manager told me that we won't know more until about 60 days prior to building the car. He also hasn't asked me for a deposit of any kind, I'm not sure when that will happen. My order was put in about a week ago.