Increase my supply?

Is there any way I can increase my supply? I’m a FTM, my baby is 10 days old, and I feel like my milk is really low.

I nurse on demand or at least every three hours.

My pediatrician is having us supplement my son with formula because he had a severe case of jaundice.

His diaper count seems a little low to me if we don’t give him the formula, which is making me think he isn’t getting enough. Maybe I’m just being nervous because I’ve never done this before. Idk.

Any tips or advice?