He has £2200 a month for personal spending and you have literally none, but all the money you have is going to pay for joint expenses. You need to set up a joint account so that all joint expenses come from that, and then you need to sit down together and go over your budget to work out how much money needs to go into that joint account at the start of every month to cover your joint outgoings, plus personal spending money for you, if the agreement is that you will not work at the moment to cover childcare.
I suspect he doesn't realise how much meeting the needs of 3 people costs and has lived in comfortable oblivion. My dh, bless him, he is lovely, but he doesn't often look at our joint account - he has his personal account and a business account to manage - and he can sometimes be like, but where has all the money gone? Because he isn't the one spending it (I sort all the food shopping, kids activities, school uniform, shoes, etc.), he doesn't actually realise how much it costs. He will stop at the local shop and buy stuff to make sandwiches for lunch, but doesn't really think through that £20 worth of bread, ham, crisps and drinks for 4 people, multiplied by 3 meals a day plus snacks, does in fact add up to be our weekly shop cost (obviously, we are not spending £20 per meal from the local shop all week 😂but what I mean is it's easy to think food doesn't cost much when you only spend a little on it here and there, but when you are buying in bulk for 4 people, it's going to cost £100-150).
It's not hard to work it out, but when you are blissfully ignorant of the actual numbers and the actual things that need purchasing, it's easy to think life isn't as expensive as it is. Dh was shocked the other day that a bottle of Heinz ketchup from the petrol station cost £4, because honestly, he's not bought a bloody bottle of ketchup in a few years. 🙄The difference is though, we both have control over our joint finances, we both pay in, and if ever there isn't enough, dh will gladly pay in more as he is the higher earner.
But no, that's not enough money to live comfortably. We are a family of 4, and I'd say we spend £1000-1500 maybe a bit more on expenses beyond mortgage. So that includes food shopping (£100-150 a week), kids clothes/shoes, lessons/activities/birthday presents for friends, childcare during school holidays, days out including drinks/lunches/snacks when out if needed, fuel, other essentials like medicine, etc.