Please don't pretend that being a SAHM is actually a job, as that really is cringe and try not to judge parents who work. Women and men who work for a salary do all the same things as SAHMs as well as have a paid job, they just do it outside of working hours or in between if the are WFH.
I agree in that nobody should be judging anybody. There are definitely many ways being a SAHM can be easier; you aren't juggling a boss's deadlines or a stressful commute, for example. There is more time, albeit with demanding babies/toddlers.
However, the housework side is undeniably different depending on the setup. I have one friend whose children are in wrap around care; the house stays tidy while she’s out and she isn't doing three meals a day, so the domestic load is naturally lower. It is drop off at the childminder, work, pick up, home, bath, and bed. The childminder provides breakfast, lunch, and dinner.
My other friend, however, is WFH with kids. A grandparent babysits, but in the home, so she’s dealing with the constant mess and clearing up, and occasionally having to intervene on top of her job! She has it really tough because the house is active all day.
All situations are certainly different and the volume of housework changes depending on who is actually in the house.