In our road WhatsApp Group, someone has just asked if anyone's teens wanted to water their garden whilst they were away for a week to earn a few £££
It reminded me of when my dc first started doing jobs like that, the responsibility is on you as their adult, to go with them and make sure the house is locked up / the animal's cage is properly secure if feeding / cleaning out pets etc.
I even remember when my dd2 was about 13, she wanted to babysit so I agreed to take her to my SiLs and to take something to occupy me, and she was responsible for getting her little cousins ready for bed, juggling the fact there were two of them, and so on. Obviously I was still there and actually responsible for making sure all was well, she gained experience, so by 15, she was doing more babysitting for more people, very confidently, having been "practice babysitting" for a couple of years beforehand.
Same as when my dc1 got a job delivering the free paper when he was 13. If you factored in my time as well, stuffing the leaflets into the papers with him and me driving him over to where his route was and then me fetching him, the company owed us a lot more than he was paid, but I felt it was valuable use of my time in helping him learn about commitment and earning and still going out when it was raining or cold or if he had a better offer etc., and, enabling him to earn some money and begin to understand the "value" of money in terms of how many weeks he'd have to lug this heavy pile of papers around in the rain in order to buy X, etc.
It is for you to know if you have the time and commitment and will to support your dc into sort of apprenticeship roles, so they are confident, capable and experienced when they get to an age where they can work without you, or, if you don't think that is good use of your time.