I posted on here a few years ago under a different username (not sure what it was) to see if there were any others that had experience with adjusting status of an adopted minor child. I got a lot of negative responses.
My spouse and I adopted a child within the US whose parents are still alive. It took a few years, but a few months ago, his green card was approved based on the adoption (by being a minor child of a US citizen).
Just wanted to give hope to anyone else that may be going through the same thing. It's extremely difficult, but it is possible to do. I can provide any general information that may be helpful to others thinking about or going through the same thing.