Our next door neighbour had a stroke, lay there for four days, which we feel bad about (she's a very independent widow so while we always chatted to her, and asked her if she needed anything when the COVID thing kicked off, she mostly kept herself to herself).
It was mostly luck she was found, we can't see into her garden or house, it was just chance that a guy on the street below was trimming some bushes at the bottom of his garden which abuts hers and he heard something, couldn't figure out what but thought it was a voice, so he called the police who had to break-in and found her on the floor of her conservatory.
She survived and is in a rehabilitation place a year later, but it's unlikely she'll ever be well enough to come back home apparently, according to the friend of hers who comes around to check the house every week.