If it helps, I have three children under 6 and we don't have any help in the way of cleaners etc.
We both predominantly WFH. One of us FT, the other 4 days.
We basically tidy all the time, definitely have everything tidied away each night. We do most loads of laundry at the weekend, usually have one drying on the line, another on an airer and sometimes another in the tumble dryer. Then maybe a midweek load. Partner and I re-wear our clothes at least for a few days depending on weather but the kids get through a lot.
I do easy meals during the week; pasta, pizza, beans on toast etc although currently trying to improve this.
Cleaning wise, we blitz at the weekend. One of us will hoover downstairs with the kids while the other is cleaning a bathroom. Then later on one may watch a film with the kids while the other does the other bathroom and bedrooms. Wipe down sinks and toilets regularly throughout the week. Clean kitchen while cooking dinner etc.
The trick is good storage to hide things and not having too much clutter.
Online food shop. Use Amazon for lots of stuff to save time (regrettably).
Honestly, it's fine. Although I would say we probably only have 1 thing planned each weekend like a party or family get together and have 1 day saved for chores/pottering.