My 7 year old son has struggled with incontinence ever since I took him out of diapers and it appears that the underlying cause of (primarily) pee but also poop accidents over the years is chronic constipation. All we were ever given to do about it was take Miralax (PEG) but without proper follow-up, it only worsened his symptoms. We went out on our own and have been doing daily enemas since February of this year - although expensive, I highly recommend the Enemeez Docusol Kids brand. We have finally, after two years of going to specialists, made our way to a GI/motility doctor who is confident she can help my son become continent. Her approach is to do a barium enema, cleanout, and then x-ray again to make sure we've totally emptied the colon, and ONLY then start a daily management protocol on Miralax. Next step, if needed, would be to do at-home transanal irrigation, meaning flushing the colon from the top instead of the bottom. She has done a few podcasts that may be of interest to you. Check out the Bowel and Bladder Matters podcast on Apple Podcasts, episodes with dates on 7/19/22, 8/24/22, and 10/10/22.