Is playing in your own yard really "unsupervised"? Similarly to you, when I was a kid (in the 90s), I would leave home on my bike after breakfast and come back

Is playing in your own yard really "unsupervised"? Similarly to you, when I was a kid (in the 90s), I would leave home on my bike after breakfast and come back before dinner. I was maybe ~10yo. Now that was unsupervised.