Amazon Family question regarding teen account and Prime video

Years ago I set up my Amazon Prime account for myself, my wife and our two children. As of October 1, my wife is no longer able to make purchases. I don't understand, but I guess there's something called Amazon Family, and she is on my account, as are my teen daughter and young son. I guess I have to send an additional invite, even though she is already on my account? I don't get it.

Additionally, my daughter is set up as a teen account so she can make purchases, but she no longer has access to Prime Video and I can't grant her access without creating a new child account (which prevents her from watching teen stuff) or adding her again as an adult (which is forbidden because you can only have one additional adult (my wife)) on the account. WTF Amazon?