Sleeping/supply question

Question for mamas who are exclusively breastfeeding or pumping, how often does your baby wake in the night?

Since my babe was 1 week old, he has slept one 5-7 hour stretch at night and then goes back down for another 3-4. While I enjoy how long he sleeps, I’m worried about that first long stretch affecting my supply. Baby is gaining weight and eating plenty throughout the day, so his doctor isn’t concerned. He’s also almost 4 weeks now and I haven’t had issues yet, but I’m paranoid that it’ll eventually catch up to me.

Anyone else have a good sleeper and how is it affecting your supply, if at all?