in regard to the mention of diagnosis and difference between OSDD and DID, usually, in north america anyway, if you are co conscious with an alter and don't have black outs or time loss, it would be diagnosed as OSDD and not DID.

DID is usually only diagnosed when you have black outs or time loss and the alters take over the body; otherwise, it would still be considered OSDD.

on the other hand, i have been told a person can have the diagnosis of DID and be co conscious with alters, so i am not sure how that differs from OSDD.

someone could also move between having black outs and time loss and be said to have DID but gain the ability to have co consciousness which would then probably change the diagnosis to OSDD.

regardless, they are treated the same way since they are on the same spectrum and so closely related/similar.