Well... at least where I live all most pdoc's do is to prescribe & monitor psych med's. Pretty-much everything else is left to mental health therapists. I've been kicking around the mental health services system where I live on-&-off for over 20 years. And I still don't have anything in the way of a diagnosis. (I presume there's something written down somewhere for insurance purposes. But whatever it is it's not really based on anything.)
Part of the reason for me not having a real diagnosis is, I presume, I've only seen a handful of therapists for very brief periods. (I never really found one I thought could be of any real help to me.) And at this late stage of my life, it no longer really matters. Yes, it would certainly be wonderful to have one's pdoc, psychologist, or therapist offer a diagnosis & then go on to explain what it all means. But in my experience at least that is fantasy. Perhaps someday...?