It’s normal but not every woman see it while pregnant some see it as soon as baby comes out
Mine didn’t come until 8 days after the baby was born 😓
I started leaking at 28ish weeks with my first, milk properly came in 3 days postpartum. Then with my second I didn’t start leaking until 36 weeks and my milk properly came in at 5 days pp 😅
It's a variation of normal. Don't stress. Invest in some breast pads. Washable are great.