Thank you. This is my first night on the forum, and really any forum, so I had no idea what to expect. Sounds like it probably isn't the right place for me and my concerns.
Honestly for your specific request about having parents look at their childrens' heads and pull on their hair to tell you what happens, a general parenting forum would probably have more people that can help you. I think without even doing that the answer would be "yes there are loads of tiny hairs" (as many children still have very fine hair at that age) and "no it does not come out very easily" (as hair should never really come out very easily).
But if you want to evaluate why she is losing hair and what you can do to investigate it, this site might not be bad for that. If you have blood results for her, you could post them. If she saw specialists, you could post what they said about it, etc.
99% of us on this site are guys losing our hair from male pattern hairloss in our 20s/30s/40s.
Personally I would still just recommend you get her in for derm/endocrinologist assessment. That's clearly not normal or common for a girl that age. I would take it seriously and make sure it was fully evaluated.
If there's something potentially wrong with your kid that's very rare like this, I just don't know how much useful information you're gonna get from random people on the Internet, or how much of your decisions it would be wise to base on that (rather than seeing more doctors who specialize in this).