My one and a half month old baby drinks very little breast milk. Is that enough for her, she has no interest in milk, any problem?

A. hello check on babies urine output and if it is passing urine minimum of six times to 8 times in a day means baby is taking sufficient feed and you can also check if baby is gaining a minimum of 600 grams to 800 grams per month then it is a good weight gain meaning baby is taking sufficient feed