first about error regarding water-pump: 2E85. Unfortunately, this is a pretty common error and nothing can be done (except replacement). A few years ago I tried to open these pumps, without success (in undamaged condition)... There is a little bit more about this issue: https://bimmerprofs.com/electric-waterpump/
And now - please, check files in the attachment!
As I see, some time ago all adaptations were cleared, right? Unfortunately, re-adaptation is not successfully finished.
1. flywheel is not adapted (minor problem);
2. thanks to problems with NOx sensor engine never performed Stratified charge and as the result - increased fuel consumption, no data regarding injectors, etc.
NOx sensor is damaged, no doubts. NOx converter - 99.9999% too (taking into account high mileage on your car + driving with damaged NOx sensor).
I don't recommend installing OEM NOx sensor, you will meet 30E9 error very soon (and - Stratified charge will be disabled again).
In addition injector of 6th cylinder looks suspicious (leaking at idle), but 100% confirmation will be available only when Stratified charge will be re-enabled.
At this moment I see only indirect symptoms: increased mechanical efficiency; incorrect fuel mixture for 4/5/6 cylinders, lowered offset type LTFT for the 2nd bank, disabled idle adjustment for a 2nd bank, etc.
Problems with water-pump and NOx system need to be solved first. Then - re-adaptation of the engine and - additional attention to bank 2 and 6th cylinders data!