Did you sleep train your BF baby? If so, when?

I'm differentiating between BF and bottle fed because I think many parents hesitate to sleep train BF babies because of not knowing how much they eat? We did more sleep training methods with our first and he was bottle fed from 4.5 months on....and I've done zero sleep training with #2 and he's EBF. But in reality I know he eats and drinks enough....