Sleep

If your baby has exceeded their birth weight I think you can let them sleep!

I went through an anxiety roller coaster with this. My health visitor said as long as LO gets a feed somewhere between 2am-5am if breastfeeding so they get prolactin then let them sleep. Mine can wake on her own somewhere between 2.5hrs and 4hrs
If she's hungry she'll wake x

We were waking our little one every 4 hours until recently we were advised we can let her wake us for feeds. She now sometimes sleeps 6/7 hours before she needs a feed. Usually she will wake between 3/5am then go back to sleep for a little while.

With both my boys once they got back to birth weight I just let them wake me. It was always within the 3/4 hour mark anyway.
I did wake them to feed during the day if they had gone over the 4 hrs mark just so they got enough calories so they are more likely to do longer stretches of a night. Obviously sleep at this age isn't something you can train, it's all down to the baby, but doing this must of had some positive impact as my first was sleeping 6/7 hour stretches from 8 weeks and my second who is 7 weeks does a decent 5hr stretch for his first stretch of sleep 🤞