Need a little advice for a friend

Her baby is almost 12 weeks. The past two weeks or so he wakes up every single hour after midnight. He’s also hard to get down for naps during the day (he’s always been like that) Doesn’t like the car seat, stroller or swing. Does anyone’s baby do this or has done it? She breastfeeds too. Is she not making enough milk and he’s hungry or is he just using her as a pacifier to get back to sleep? I’m at a loss on what advice to give her any more. 😢 it’s her first baby too. He’s on reflux meds as well and she gives gripe water too. Any advice I’d appreciate! Thanks 😀