Not really. If you just turn your lease in, I believe BMW will give you a small credit if you’re way under miles (like $200-300 or so) to use against your dispo fee and any other lease end charges. But that’s it.
Now if you decide to sell your lease to a dealer to grab any positive equity, instead of just turning it in, then obviously the lower the miles on the car, the better the offers should be, in theory.
The first thing I’d do is check a few of the below sites to see if you have any positive equity. If not then your decision becomes easier.