Watery poop for 3 month old baby

My LO is on NAN HA since birth. From birth till 2 months old (mixed feeding) LO poo is always runny and yellowish. When LO is full FM, poo is green and runny. At times mustard color too. I did asked some mummy on social media, come say abnormal some say normal. My LO do not have upset tummy, hence I would rule out lactose intolerance. She is drinking lotsa of milk and happy, so I not so worried lah. If you worried, then consult PD lah, cause it's only recently it's happen to be watery. Another possibility could be the food you are, since you are BF? 🤷🏻‍♀️