OP, I haven't read your other threads but I have read this thread now. I have no idea why there has been an irrelevant pile-on with people completely missing the point on purpose.
I'm also another one who didn't always feed any/all of my children the same food as the adult(s), depending on the day, time, schedule, likes, dislikes, nutritious considerations and general circumstances. Sometimes we had big family meals and sometimes not. It's fine, and the right thing is what works best.
You did everything right and sensible with your planning and batch cooking, and he is indeed lazy and inconsiderate at best.
You really need to talk to someone about whether it is in your best interests to move in with this man. At the very least you need a plan to make sure you do not become subsumed by this relationship, and are able to get out of it relatively easily, and can see the red flags for what they are. There are many organisation that can help you work through things. Your midwife is a good port of call, and you could also make an appointment with your GP or self-refer to IAPT, or talk to Women's Aid, for example. To get some perspective, you can be much more detailed and complete with them than on here.
Whether you decide to proceed with merging your home and finances, or not, definitely protect yourself. Talk to a solicitor to make sure that your legal position is as advantageous as it can be if you do merge households and finances (and that doesn't just mean if you get a joint bank account, your household will have joint expenses even if one or other of you pays them individually). Don't allow your job, your finances or your health and wellbeing to take a backseat to the needs of the family this man. Maintain a fund to leave him ('fuck you fund' some people call it on here), even if it isn't very big. Only buy your baby what is really essential (and yes he should be contributing!) so you can put some money, however small, away.
While he doesn't sound like a great catch, living with him but not being married to him leaves you very vulnerable and could be the worst of both worlds because you'll put your all into it and have few rights if one of you leaves the other. He will probably hold this over you.
Maintaining as much independence as possible is important. I'm seeing red flags here. Tread carefully OP and find someone to talk to, please. 