I've had bouts of diverticulitis and was to get a resection done in 2020. Alas, Covid hit. When I feel my gut js acting up, I go straight to a liquid and soft food diet for a minimum of two days. For example yogurt, scrambled eggs, pudding, jello and lots of water, gatorade and juice. That gives my gut a chance to heal and reset.
I rarely have a problem with constipation and "go" most days (don't hate me) but when I do get backed up it's usually a sign for me to pay attention. I don't use any otc or prescriptions. There is enough fiber with prunes and roasted veggies to fix anyone up.