what kind of diet should i give to my 9 year old,who underwent surgery for intestinal obstruction two monthsback?

My 9 year old underwent appendectomy in feb. then in june only after 4 months gap she developed adhesions.

she had to undergo another surgery.

I m really worried about her health as sometimes she feels tightness near ribcage ,burp dont come easily.

Please help me with diet plan for her,she is 23 kg.