Irregular periods while breastfeeding

Renee • Married 11/9/14...BFP 6/28/15...DD 2/25/16, BFP 3/29/2019, MC 4/12/19 👼🏻, BFP 🌈 6/12/19, DD 2/4/2020

So I got my first period in March after LO turned 1, however I still feel they are irregular , I’ve gotten one every month except 1 averaging anywhere from 4-7 weeks between cycles..my periods were a little longer than most before LO anyway (between 32-42 days) but my question is does breastfeeding still contribute to irregularities at this point? Yes I am still breastfeeding on demand any time I’m not working! LO is 1yr 9mos! TIA