Welcome
Yes, I hear your frustration and fear with this issue. Here is a link that may help
https://bpdfamily.com/message_board/index.php?topic=322647.0In addition, you can look up top under "tools" and click onto "setting boundaries" for your consideration.
It is hard, we don't want to see our kids fall through the cracks. However, the reality is when they are adults, we can't force them . However, we do have power over what we accept and don't accept in our lives. You are also not obligated to financially support your adult for the rest of her life . You have a life too and it is just as important as hers.
You can click on any of our names to get our previous posts/ backstory.
Keep writing back as you have need to. We are here for you.