Is it advisable to breastfeed a 2.5 year old. She was weaned that there is a younger baby, she wants to be breastfed

Or is there a closest formula to BM .

Hi mom me too was going through same phase but now my babies doctor recommended me aptamil it contains all the nutrients which r necessary for babies over all development ND it improves babies gut health ND now I'm free from my babies hard tools problems too