my DH does an awful lot more than that too.
Sorry.
DH changes most of the nappies, when he's at home.
he also makes dinner most nights, and always makes lunch
He is a postie, so finishes work at 2-3o'clock, so makes lunch then.
(but he also does me a packed lunch when he's not going to be home in time for lunch - I work, too, but he does longer hours than me)
It's a bit different right now, because we're both off work for the baby, but even from before the baby, he would do half of the laundry, most of the washing up, about half the cleaning and tidying, and as I say, evening meals too.
He also gets a day off during the week, which he uses to do other house stuff that doesn't get done normally. (i don't get days off, except sunday)
Now we've got the baby, he takes her when I can't cope, or once I've fed her, he'll take her for a while. When we're back at work, he'll be coming into the shop to help when he finishes for the day.
I would expect a minimum of equal shares at the weekend, and helping you with the kids when he gets home from work.
SAHM means you're there for the kids when he's at work. That's your job. It doesn't mean that you have to do 100% of the childcare and housework all the time. That's not equal. It would equate to him working 40 hours a week and you working 168 hours a week. Especially as you're doing the nightshift too because he has to get up for work.