This has nothing to do with anything: "even though she came to the USA and became a resident after the first stimulus check was sent?"
Perhaps it would help to review what is really happening:
The funds were paid out as Advanced payment against a projection. The projection used 2018 or 2019 tax returns. But 2020 is the Actuals. You use the 2020 return to reconcile what a person is entitled to, against what they got.
You might want to bookmark these links and read the IRS guidance.
One for each EIP.
And please note you are Lost on the Internet, because this is for users of ProSeries to ask questions and help each other use that Program to prepare their clients' income tax returns.
"Level Up" is a gaming function, not a real life function.