Do you have sources about P-DID? Is really hard find about this disorder
Here's one, two, that talk very briefly about it.
There really isn't a lot of info, it's relatively new as a diagnosis, but its presentation has always been included in DID and OSDD/DDNOS.
That's where it gets tricky because it's hard to find articles about ANY kind of specific presentation. This is why articles on OSDD and DDNOS are scarce-- because it's all considered to stem from the same traumatic basis and have generally the same treatment, it's always lumped together.
The main difference from DID is that there very little switching. If it does happen, it's usually in very emotionally charged situations. Instead, alters typically just intrude-- what we usually call bleeding, blurry, or cocon scenarios.
Alters can be very elaborate and autonomous, or they can be mostly fragments. They can still talk to you, or not be capable of any communication aside from emotional intrusion.
They just very rarely switch.
I really like this article by Kluft (download link on site, if you don't want to read it all, start on page 17 of the PDF, or page 621 according to page number). It's super old and a bit long, but VERY interesting, I think you might get some use out of it.