Breakfast-for things like pouring their own cereals or putting some toast in, idk, maybe 6? Defo some time in primary school.
Lunch- I personally wouldn't make my kid do this, only in 6th form, and even then, I'd do it during exam season.
Family meal- as a teenager, around 14, and only if they were happy to. Though I would encourage them to help and try and make it fun throughout childhood. I think cooking is a good way to teach children about food groups and for me is about making food a fun experience we share as a family, as opposed to a chore. My baby is only 1, but atm I do things like cook the national dish of a random country each week, and I'd like to do that I to childhood.
Washing machine- secondary school, around 13. I'd expect them to fill their own laundry hamper, and throw it in the machine. I'd probably peg it out, then I'd expect them to put it away.
Clean up after meal- maybe 9ish? I mean things like help empty the dishwasher, wash their own breakfast stuff, etc. I wouldn't personally expect them to clean the hob and that kind of thing.
Bathroom- I'd never expect my child to do this, even as a teen, outside of things like wiping pee/menstrual blood off the seat, and wiping toothpaste up if they make a mess.
My general thing will be, if you make a mess, tidy it. But I really don't expect children to be deep cleaning their rooms. A teenager I would expect to hoover their room, etc. I wouldn't expect children of any age to clean communal areas, only if they've spilled something or whatever.
You've got your whole adult life to have to do all these shitty tasks. I don't expect my child to make their own packed lunch. I want them to enjoy not having too many responsibilities. I personally think people go too far with chores for children now. I really don't think not making a packed lunch or cooking a family meal as a child makes you lazy as an adult. I also personally don't understand making 7 year olds do laundry and put their own sheets on.
When I was at school, none of us did anything of these things tbh. I've grown up to be naturally messy (I do have ADHD) but I manage with a rota. I never so much as touched an oven, but have grown up to love cooking. I just taught myself at uni. I have friends ranging from very tidy, to average, from loving cooking, to living off of oven food. I think a lot of it is innate personality!