I had an experience in using Kitalpha Transposer to transform Physical Architecture to a new Technical Architecture
that I’ve added. In Capella Studio there are 3 examples how to use Transposer to make model to model transformations.
As I understand Transposer is used in Capella for Rec to RPL transformation and System to System transformation only.
For arahitecture transformations another mechanism is used (projection plugins).
I would like to undertand what method should be used for such transformations.
In any case Transoser can be used in your case also.
Link to Transposer presentation
https://wiki.polarsys.org/images/9/92/Kitalpha-CTK-TR-Transp oser.pdf