Talk to Pediatrician on My Toddler Daughter (3 Y) Has A Functional Constipation Issue.

Hello, my daughter has just turned 4th year this July. As a working mother, I had to feed her both the mother feed and the formula. Later, I had stopped feeding her when I was 5th month pregnant for my second baby. She started developing constipation gradually after her 18th month. She still has the same issue. I consulted all the Pediatricians here in Quetta. Some say, this is for the time being, some say it's due to formula milk and some diagnosed it as Functional Constipation. By the way, she still has a milk bottle feed of some 2 to 3 feeds per 24 hours. She eats whatever we cook at home, besides I try to give her fiber rich food too. She also takes a good quantity of water. She takes meat, grains, fruits etc. She has been given Prune Juice syrups, Fiber supplements, but all in vain. Currently she is on Skilax drops (10 to 15) each day or on alternative day so she can pass stool otherwise no way. I cannot yet get rid of her Diaper habit too as there is no specific timing or schedu