How often does breastfeeding normalize? I feed my baby at night around…

How often does breastfeeding normalize? I feed my baby at night around 8-9 pm and until 4 am, then every 2-3 hours. Previously, I woke up when I was feeding in the middle of the night, directly from one breast to another while pumping the other. Now, for a couple of days, I haven't noticed this anymore, is it normalizing or is the milk disappearing? I started worrying about that because I don't feed him frequently at night, he's doing well on his weight gain so I don't wake him up at night, I feed him according to his needs.