In the United States, once a juror is done with a trial the judge says, “You are free to speak with anyone you wish to speak to about your experience”, so they do have the opportunity. I've conducted a lot of post-trial juror interviews and the jurors, particularly in longer trials or particularly in traumatic trials, become close friends and support units for each other. That support system helps alleviate the need for counselling because they do have someone they can reach out to who experienced the same thing.
There's a movement going around on court reform that is testing whether or not jurors should be allowed to talk about the trial during the course of the trial. Whenever they are in the jury room, they could start to talk about some of the evidence and what they are seeing, with the idea that if it is an interactive, ongoing process, they ultimately have to reach a decision. Of course, the opposite side of that is the concern that there's undue influence by one particular juror or their misunderstanding of the evidence that would affect the verdict.