I too was contacted by her (or him) in the past. As I have been working in Information Security for many years, it is my natural reaction to distrust things. I've read too much about scams and seen many of them as well.
It is not always pleasant to be suspicious because the real people in need of help suffer from this, which is actually quite sad. I seldom donate money to people or projects that I'm not close to 100% sure they are legit.

You did a good and thorough research. My compliments. As scammers use AI nowadays, you can also use it to expose them.
I hadn't seen the hospital bills before, but the first thing that I noticed when I saw it in your post was the Gmail address. That was quite a red flag for me.

Again, it is sad that these scammers ruin it for the people that really are in need 😢