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We actually found late night click and collect really convenient.
Also we've been doing Gusto while there's a ~30% promotion for 4 meals a week. It's ~£3 p/person p/meal. Despite being more expensive than us buying the same ingredients from the supermarket ourselves, it's brought our shopping bill down because their focused and planned.
My dad does the equivalent himself for him and my mum. But he's retired rather than drowning looking after two kids under 3yo.
Buy big things you know you'll need weekly online. Then walk with the buggy to pick up smaller things as and when through the week. Also good for exercise.
On the smaller shops, actually you'd be surprised at how much less you spend when you're not bombarded with all the offers and encouraged to buy extra.