Hi and welcome! I am on hols until tomorrow with dodgy wifi and poor service so I will be back here on Saturday😃
It sounds like he is going at least 2 hours between feeds so for 4 weeks that's fine. If he's hungry before 3 hours it's ok to feed him, be careful offering water they should only be offered an extra oz or 2 in 24 hours if it's very hot where you are.
There are a lot of growth spurts close together in the first months so they do need the feeds. Can you post your days with times so I can see what's going on please? So
Eat - what time and how much
Activity times - remember A includes the E time!
Sleep what time and how long for.
Laura