I think that I should have written my original information better.  

both returns were filed and accepted over a month ago.  So I was surprised that they then received a $1,400 payment on their own based on 2020.  And a  $1,400 payment was included as part of the  return from 2019 where she was claimed as a dependent by her parents 

I did say that she finished college and started working.  So she  couldn't be claimed by her parents.  Wasn't a can you be claimed by someone else scenario

Thanks for the information.  I have my answer