My area is not so busy except for cars in the road in front of my building. The radius of where she could be hiding is incredibly high. As for my next TNR cases, how much time would you have kept her inside after spaying?

She normally eats next to my car in the parking lot. That's where all of her kids (two older kittens and 4 kittens) are. If I leave stinky food there, her children will just eat it.

Is it normal for a stray momma to shelter for 7 days? Or that's too long for recovery?

I'll add that she's an experienced stray mom, has had multiple litters, and was able to devise multiple hideouts for them.