Looking at your shopping all the dairy free alternatives are expensive. I realise your husband can't have milk but that doesn't mean everyone in the family should be dairy free. If it was a child I would say have the whole family but your DH is old enough to have his own shelf in the fridge.
The soups are expensive, it is much cheaper to make your own and you can use the bits of veg you normally throw away such as the stems of broccoli and cauliflower. Yes I do have soups in the fridge but they are for 'emergencies' - sorry I can't think of a better word.
I know you said you are not a good cook or baker, I think you are just inexperienced. Could you get a children's cook book? Then you and your children can learn together? Scotch pancakes AKA drop scones are really easy to make.
I agree to making the pita pizzas. Get the children involved with other cooking.
You seem to have bought lot of bread, how do you use it?
Stir fry sauce is expensive, I understand you might be nervous to try making your own but you could go half way. Buy a sweet chilli sauce, a bottle of soy sauce (light looks better but I prefer the taste of dark) and some garlic, the garlic could be fresh if you're confident to chop / grate / use a press, other wise get a tube of garlic.
Start with putting a few spoons of the chilli sauce in a ramekin, then add a teaspoon at a time the soy sauce and garlic, mix together and taste, add more ingredients depending on taste and keep going. Once you have one down you can add chillies or spring onion or rice wine or whatever. Yes it will cost more to get the three ingredients to start with but you will get a load of stir fries out of it.
For breakfasts, at the weekend make a batch of pancakes (the difficult bit is stopping children eating them) once made wrap in foil, either the whole stack or in ones and twos. Freeze them. When you want pancake for breakfast either put in the oven / air fryer or take off the foil and microwave.
Make a batch of 'breakfast muffins', there are lots of recipes on line but basically lightly oil a muffin tin, in a bowl crack eggs and whisk, you can add cheese and / or herbs t this point. In the muffin tray you can add bacon, ham, spring onion, whatever you have in the back of the fridge.
Pour the egg mixture over the bacon or whatever, bake in the oven for 15 - 20 mins, they will rise and then sink. Once cold put in a bag and freeze, microwave in the morning for breakfast, if you are running late they can be eaten on the go.
Beans on toast is quicker than you think for breakfast.
Open the tin(s) of beans and put the contents in a plastic or Pyrex jug, cover with clingfilm.
Put the toast in the toaster, microwave the beans for 3-5 mins, once the toast is ready just pour the beans from the jug.