I wanted my DC to know:
how to manage money. How to stay out of debt and budget for essentials as well as setting money aside for fun
how to cook at least three healthy everyday dinners and one slightly fancier one for having friends over
good self care, from daily showers and clean clothes to self nurture when they feel low or life is tough
basic social skills - how to be polite, friendly, assertive, how to disagree without offence.
how to cope with rejection without going into a tailspin of depression and self doubt
how to politely say no
how to ask for help if they are stuck with something rather than let the problem escalate
how to apply for a job
how to cope with/sort out minor problems and issues, like booking own hair/teeth/eye/GP appointments, contacting landlord when washing machine breaks down etc.
My DC still haven't learned to drive. Both said no point until after uni as they are in uni cities where they don't need a car and they don't want to get rusty, but I'll prioritise them learning as soon as they've graduated. Such a backlog due to Covid, I haven't rushed them yet.