It’s to be expected that her appetite isn’t back to normal yet. Pellets is often the last food they go bak to. If she wants lettuce, give her lettuce. She can basically have whatever she wants to eat today, in sensible amounts. 30-40 poops is good. Her not drinking is probably because she was given fluids during/after surgery, plus she hasn’t eaten very much dry food.
Tell hubby to keep an eye, give her a blanket and a hot water bottle if her ears feel cold, but she must have space enough to move away from the heat source if she wants to. Hubby can offer her a treat and speak to her now and then, so he can see if she seems normally responsive.
If you dont have Critical Care, pellets soaked in water can be fed with a syringe, but it’d be very tricky for hubby to do that on his own, I think. You often need two be 2 people, handling a bun with a operation wound on her belly isn’t the easiest thing. It sounds to me like she’s doing good under the circumstances though. Empty her litter pan and put in fresh litter so hubby can keep track of poop and pee.