From what age do babies start to reduce milk intake and show more interest in food

Hi Mummies, My boy is 9 months old and I have noticed that he drinks less amount of milk as compared to previously. Is it because he likes solids more ? Curious to know that from what age babies start to show more and more interest in food and drink less milk ? This would also be a cue for me to wean off pumping hence looking for advise. Any mummies who experienced this ? #firstmom #advicepls