I was looking for Material Graph advanced tutorials when I found that :
HDRI Pack :
https://cloud.mail.ru/public/EKGd/VNMfzKcWu
It's often looking for something else that you accidentally find the stuff you couldn't find when you were looking for it. Google is a very deceiving "best friend" :P
Note that I don't know if they're any good as I'm currently still downloading it. But with such a big file it's hard to imagine that there won't be anything useful in there.
ty its really useful <3