Newborn doesn't want to sleep...

Malaika • Saim ❤️
So my baby boy Saim was born on 6 May, he doesn't even have two weeks. I thought small babies like him should sleep about 16 hours a day but he sleeps maybe 8. He had some diarrhoea problems and I'm breastfeeding and giving formula because I don't have enough milk. He is gaining weight and generally doing well but I am just worried about his sleep. Is it normal ??