Which country.
In the US they can drive at 15 and many walk to the school bus stop etc
My children are safer at home 16 and 10 without me then out with a load of children on their own but their own age eg 5 x 16 year olds together.
We have a huge house, elderly but active neighbours on both sides. Both have mobile phones but they live a 5 minute walk from a police and fire station.
we have a fully enclosed garden
we have two dogs and cctv and a ring doorbell
they can phone me at any time
they might use the oven if I’m not here - but other than putting a pizza in - they won’t do much.
we have huge first aid kits - burns etc and eldest is a scout leader and first aid trained
younger one has also done a survival course, first aid and started using the kettle aged 6.
We live in a quiet town in Somerset. They both have at least 10 phone numbers of adults they could ring if I didn’t answer who would come at 2 am. We have a fire extinguisher etc
by aged 8 I was roaming the countryside round here alone - and I mean alone no phone etc
eldest with regularly roam the countryside but they take their hiking stuff, water, phone, charger, map, compass and a first aid and survival kit - I honestly think it’s an overkill but as a gold D of E person - that’s what she does …..