Baby is 11 months old breast fed… still not sleeping through night

Wakes up average every 3.5 hours… sometimes 2…. Was doing for a bit 5-6 hr stretches but not long.. the past maybe two months back to 2-3.5 stretches. Didn’t ever take to formula in bottle… didn’t Pump much because I have a two year old also so not as much time to do so….

Any tips? A little extra sleep would be nice although not complaining I feel blessed to be able to have this journey of breastfeeding. Thanks