My 11 year old DD has been involved in the kitchen all her life (from cutting soft things with a kids knife sitting in her high chair beside me). I have also let her do 1 week cookery camp 2 summers ago, where she was formally taught safety and knife skills etc, so not just by me. We've built up over the years under supervision to reducing that as her skills and ability grew.
Now, she comes home alone 2 afternoons a week from school and cooks herself a hot snack using microwave, kettle of boiling water into pot noodle type pots, grill for a toaster or the electric oven for pizza/fish cake/goujons and chips etc. She will occasionally peel (half!) the veg for dinner (often wanders off before finishing but it helps when I get in😀).
She can use the job and is grand to cook something once it's turned on, but she's not confident at turning it on herself (it's gas) even though she can. So we are all happy that she only cooks on the hob when DH or I are at home.
She is also very slowly learning to use other electric tools like my kenwood chef, a stick blender and a smoothie maker, under supervision. She is not allowed to use the chip pan and won't be for some years yet.
We taught her as we were doing things how to do it properly and safely, and have always chatted about what to do if something goes wrong. Including burns (she seen me under cold taps a few times😳) and cuts (she is not bad at cleaning up near cuts and putting on a bandaid). And knows to get help from neighbours if we're out and she needs help.
Maybe try it out first by letting them do a meal unsupervised while you are at home- go do a job upstairs or in the garden so you are there if they need help or reassurance but not physically in the kitchen to give them the trust and independence. Then progress to going out.
If they were in Scouts, they would probably be doing it all themselves on an open fire at camp with their patrols, with leaders available but not actually directly involved.