6Mo Started solid and constipated

Nolo

My 6mo started solids but the poop is hard and baby pushes when pooing. Tried apples, pears but no difference. Prunes help but for the one day, can’t give daily. Baby drinks water after eating but not a lot. I started feeding cerelac now but no difference yet. Any tips on how to stop constipation long term without using medication or prunes.