My bad! I misread that. If your child has lived with you for more than half of the year and she meets the age and support requirements, then yes, you should be able to claim her as a dependent.
In late summer the IRS will update its Child Tax Credit Update Portal to allow you to make changes to your dependent. Since you did not claim your daughter on your 2020 tax return you can use this portal to indicate you will claim her on your 2021 return and may be eligible for the advanced child tax credit payments.
