Are y'all babies sleeping through the night???

My babies are 14 weeks and they have a pretty good sleep (can't complain) but they keep waking up every 4 hours to be feed. I made a little bed time routine and by 9pm is the latest that they are sleeping then after that they wake up around 1ish to be feed then 5ish or 6am.

I was wondering if y'all have any tips for the sleep breaches to be longer. Some people have told me to feed them to make the bed time around 10pm and don't feed them again until 6am so they "get used" to not eat during the night but I think that's cruel.