TIP: to find out what the current lease conditions (Money Factor aka MF, Residual Value aka RV, and Lease Incentives) are offered by BMW FS in your region and for your exact model, check
this thread on Edmunds, or ask if there is no recent information.
As of early September, 2023, Money Factor (MF, aka "buy rate") for all iX model leases is 0.00111. iX50 has higher residual values, starting at 54% for the cheapest lease (36 months, 7500 miles per year). M60 or more miles per year will have lower residuals, naturally resulting in higher payments. All leases get $9900 lease credits, which are handled as taxed incentive. These values haven't changed since early July, 2023.
If the dealer is offering higher MF than the buy rate, they're making extra money on you, and you should take this into account. Some dealers prefer to mark up MF but give you higher discount to compensate.
I haven't seen variation between different regions or zip codes for MF or residuals, but that doesn't mean they won't show up in future.