How much are your formula babies eating?

My LO is almost 5 weeks old and sometimes I have a hard time figuring out if she’s still hungry or if she just wants to suck.

Yesterday she slept so hard she missed regular feedings twice. She went almost 9 hours without food last night and then this evening she went almost 5 hours.

As such, she’s woken up more often tonight to feed but at the end she’s still really rooting - she’s fed almost 4oz per feeding.

I guess I’m just wondering if because she’s skipped feedings she could be even more hungry or if that would just upset her little tummy.

TIA!