All the dash parts, and the upper center console parts are interchangeable between 1500 and 2500. So, the center dash that houses the radio screen/aux switches are interchangeable.
Aux switches work on both, and 2019-2021 radios work on both within those years.
As far as 2022+ UConnect 5 radios, some have said that the 1500 radio modules don’t work on 2500, and some say they have gotten them to work.
All of the 12” and 8.4” with nav screen “generally” are interchangeable:
If the truck is Cummins equipped, there is no such thing as a lower switch bank that has the traction control button AND the exhaust brake button, the traction control button is either on top of the 12” screen, or on the 8.4” screen radio bezel. Since 1500’s don’t have 12” screens or 8.4 radio bezels with the traction control button, they wouldn’t be suitable for a Cummins equipped truck.