Is this fair for my (38F) husband (40F) to ask of me?

My husband and I relocated to another province in 2020 due to his work. He makes quite a lot more than me (700-800k vs my 100k). We were unmarried at the time of our move. He has at least 1.5MM in savings (I'm unsure the exact amount) and I have 300k in retirement savings. Our accounts are completely separate.

When we first moved he had told me he would pay for the bulk of the household expenses (rent, my car, groceries, electricity).

As we progressed in our relationship, got engaged, he informed me he didn't feel comfortable paying for the majority of the household expenses anymore and that I should contribute. No problem, I took on my car payments, groceries, internet bill and electricity bill (~$2000/month). I also do 100% of household chores, he cuts the grass and may take out the garbage once in a while, nothing else.

He put a large down payment on a house and pays the full mortgage, car and house insurance, and dinners out (~$3400/month). When we go home every six months he spends money on food ($1000/week) but he is a compulsive saver. He won't spend any money on himself and does not buy me birthday/Christmas/anniversary gifts. I also have bought almost everything needed for our first child.

Now we are married and have a 6 month old child. He told me when I first got pregnant that I need to keep up with all my household bills and if I don't make enough I have to dip into my savings to cover them for the remainder of my maternity leave. We live in Canada and have the choice of 1 year or 18 month maternity leave. He insists that I take the full 18 month maternity leave to be there for our child. The last 6 months of maternity leave will be unpaid. Note: I do not have access to any of his money and he does not access to mine.

I have raised concerns about having another child with him because I simply cannot afford to cover the bills and not deplete my savings if I have another child right away.

He wants another child ASAP because of my advanced age. He says if I don't want another child he wants to split all household expenses 50/50 (right now they are about 65/35).

Every time we argue he brings up the fact that he pays more for our household expenses and holds it over my head.

Im kind of stuck in corner and guess I just want to know, is this fair of him to ask this of me?

Edit: To clarify, we do not have a prenup, and for the people asking about his savings, taxes in Canada are 50%+ and he's only been making 800k for the past 2 years.