Even if you amend your 2019 return it would likely take until the end of the year (or longer) for the IRS to process the Form 1040X. So your daughter's chance of getting a stimulus check in 2020 are slim to none, realistically. And....the rule is if the child CAN be claimed they must say so on their own return--even if no one actually claims them. If she marries in 2020 then for 2020 she and her spouse can file a joint return. If they file a joint return, no one can claim either of them as dependents. The stimulus money is an advance on a credit that will be available on 2020 tax returns.
As for the "second" stimulus--Congress has not yet even voted on it, and no one knows at this time what it will be or who will be eligible. Maybe in the next couple of weeks we will know, but for now....no one knows.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
