Migration between devices #2 (e.g. SLG46824/6 to SLG46533)

Dear Forum

When having 2 different footprint compatible GreenPAK devices on otherwise identical boards, production testing and later the register updater need to recognise which GreenPAK device is actually assembled (in my example SLG46824 or SLG46826 or SLG46533). Something like a WHO_AM_I register.
I think this is done on the dialog development kit as well, and maybe register bits 1839-1836 (Product Family ID) is at least part of what I'm looking for. However, detailed info is missing in the datasheet.
Please provide more information.

Thanks for information
Peter