How can I make my baby sleep longer stretches at night?

Hi all 👋 Does anyone have any tips or experience on how to help your baby sleep for longer stretches at night? So without having to feed every 3 hours. I have a 5 months old baby who I breastfeed exclusively. She sleeps well but is used to feed every 3 hours at night and I struggle to keep up. I’m tired of the broken sleep and I hoped that it would get better with time. Everything I read online says that there’s nothing really you can do… But I can’t believe it. They say that to feed them cereal or formula at night won’t help. Perhaps I should try to train her into not feeding that often but it’s difficult as I prefer to calm her when she wakes up so I can continue sleeping… Thanks in advance 🙏