great questions one problem... since 2013 if I ask any treatment providers in my location these questions they would tell me of course...

if you google PTSD (no complex in the word) you may find that the basic definition is trauma caused by abuse, events like car crashes, military combat, death...troubles with interpersonal life, problems with trust and others that are all mentioned as part of question 1

question 2 my treatment providers and those here where I live usually say yes I have treated people with your same problems how many is none of your business we are here to talk about you not my other clients.

question 3 training..here treatment providers in my location already list their specialties/ training and credentials on paperwork that a person receives about the agency's and services provided. also clients go through an intake process where the client fills in forms and then gets matched with the treatment provider that works with that clients problems either through the agency or through the insurance company based on who the insurance company has listed for treating those problems (here in america its the law that all american's have insurance)

question 4 here in the USA unless the treatment provider is in private practice they automatically have a supervisor that over sees their cases and holds meetings with them about their cases, the USA takes this a step further by each state has a state board that also over sees treatment (providers public and private practice), and each county has their own ethics board that also over sees treatment providers (public and private) in the county.

question 5 here in the USA all treatment providers must have their own treatment providers...example my therapist has her own therapist.

question 6 since 2013 dissociation has been added to many mental disorders so most if not all treatment providers in my location know about dissociation and which mental disorders contain those symptoms.

question 7 its standard for treatment providers in the USA to refer clients to specialists example when I was having physical health problems I did not have to ask to see a specialist it was just part of my insurance plan and also something my treatment providers were / are required by state law to do.

Question 8 here in NY and the USA its more a hands on approach where they ask the client when would you like to come in, the client sets their own schedule process. (unless they are court mandated into treatment in which case the treatment provider and the court sets the schedule.) treatment providers can say ok Ill see you next week and the client can say no Id rather see you monthly or what ever schedule is more convenient for them. this hands on approach makes it easier for those who like me work. we dont have to leave work to go to therapy and go back to work afterwards. we set out own schedule matching it with the treatment providers schedule

question 9 treatment providers in the USA are required to have another treatment provider covering for them in events like sick leave, paternity leave, vacations, work related trips. the odd wake up with a cold or flu kind of thing they reschedule. example when my treatment provider is out of the office she calls another treatment provider who will cover any situations that come up while she is out of the office.

question 10 this one depends on the client and what kind of insurance they
have insurance and agencies in the USA now assign the treatment providers , most times you get who you get and you have to make the best of the situation or be on a waiting list that can span years.

question 11 again this is usually determined by insurance plans in the USA not the treatment provider. usually what happens is insurance plans say they will pay for so many sessions per year and a cap on how many years they will pay for that therapist...and thats what has to be followed. in rare cases insurance plans will extend that if the treatment provider fills out the insurance company's forms on why more time is needed.

my point with me rather than asking treatment providers questions that I find online I make up my own question. Im the one with the problem, Im the one entering therapy with a problem so I base my questions according to what I want to get out of therapy.