Still seems so far away, yet I remember in 2017 they announced the X in September and pre-orders were that Friday w/ the iPhone 8, but the first units were like 11/3 which was 6 weeks later.
However, for those of us looking forward to the 12 Pro Max, 10/23 won't mean much if the rumors of a staggered release are true. The only upside is that 10/13 will give us the info, and 10/16 will give us our ship dates.
Interestingly enough the iPad Air 4 still are not available for order.