I genuinely don't know. Neighbour's DS (nearly 8 but acts very young for his age) always goes in the car with his mum in the evening to pick up his dad from work, and he's not allowed to stay home/on the shared front lawn on his own while his mum goes.
In the mornings though, DH has noticed the DS is never with them, so the mum comes back and then takes him to school. I guess he must still be asleep or just doesn't get dressed on time or doesn't want to go.
Is that ok at that age? I wouldn't leave a 7yo home alone, but I expect many do and I don't think it's as terrible as DH does. He is generally more paranoid/helicoptery than me though. I know it's a really subjective issue, and the age at which parents let DCs be home alone varies massively.
I'd be happy for him to just come over for that time (about 30mins) in the mornings, even if he's in his PJs, should I suggest it? We don't know the parents that well, they are lovely but very shy and his mum in particular struggles with English. I could suggest it to the DS though, he likes it here.
I guess what I'm basically asking is - is nearly-8 old enough for this to be absolutely none of my business and I (and DH!) should chill because it's fine? Or is it a bit young to be home alone even for a short time?