Is it important to stick to meal times even if my appetite decreases while suffering from stomach pain?

I saw a story saying that when you experience stomach pain, your hunger subsides, so there are cases where people miss meal times.

I was a little worried because when I'm busy, I usually eat lunch late or skip it altogether.

I'm not sure if it's better to eat small amounts at regular intervals even if I'm not very hungry 🤔 or if it's okay to just eat as much as I need when I get hungry.

I'm wondering if the medication is making my eating patterns too irregular.