Girls, we're on the verge? We used to wake up from milk surges in the …

Girls, we're on the verge? We used to wake up from milk surges in the morning, but now in the last days it's getting less and less. I supplement with formula, everyone says you need to remove the formula if you want to improve lactation, but when the child doesn't eat enough and seeks breast, I can't just look at it and shove an empty breast? I got so stressed about this breastfeeding. Honestly, soon I will become an expert in breastfeeding? I read articles that often you need to attach the baby, but she doesn't take it because there is nothing. It remains expressing and teas for improving lactation. So I want to ask what the best breast milk substitutes are? It would be