If you ordered today, you likely have 3+ years to wait (seems like everyone is waiting 3+ years one way or the other).
My WAG is Tesla will deliver somewhere between 60-100k Cybertrucks in the first year of production, and 250k+ each year after that. So if they start production in late 2022, by mid 2024, they will likely only have about half a million produced.
It’s possible they will push production numbers higher than 250k/ year, they certainly have a big enough facility for a lot more than that, but getting a million trucks out the door 2.5 years after production starts is a tall order.
Edit: Replied before reading the above by
@Pyre and seems like I’m a bit more optimistic, but in the same ballpark. The big wildcard is the possibility Tesla will crank up production even more than 250k/ year. Given the size of the backlog, seems like something they might consider. Particularly if demand keeps steady after launch.