Youre fine without supplementing with Iron, some Peds are old school & believe that but thats actually geared towards FF babies... the formula has to be fortified with iron. And a lot of it since its not easily absorbed, unlike what is found in breastmilk.
Make sure youre getting enough iron, and if you have concerns still, you could have her iron levels tested before supplementing with anything since Iron isnt something you want to supplement with if you dont have to esp since it in and of itself is hard on the digestive track (constipation, etc).
If youre eating well, taking prenatals, etc - you shouldnt have to give any supplements while BFing
Lala...