Baby doesn’t seem hungry?

I will also call her pediatrician about this but ... does anyone else have a babe who could care less about eating? She recently started sleeping through the night (like 9pm-8am usually), will wake up and have a bottle (6oz) and then could probably go 4-5hrs between bottles for the rest of the day. She’s a few days shy of 3mos old, is gaining weight (weighs 13lbs4oz at last weigh in about 1.5wks ago). Some days i feel like I’m “forcing” her to get 24oz in for the day. Formula fed! No signs of digestional discomfort - not gassy, no spit up, etc. Just not sure if this is normal or not?!