If the only symptom is the colour, I would say it’s fine. Both my girls had it, they did suffer with silent reflux and not the best latch on the breast. It can be a cause of concern if there’s other symptoms
Green poo is totally normal, if it lasts a long time or is accompanied by other symptoms it can be a sign of a few things. But on the odd occasion absolutely fine
Has your little one got other symptoms, or is it only a green poo?