For the first two stimulus payments, you only get a payment for a child who is under 17 years old. So your older daughter fell into the same "gap" for both payments. She's over the age limit.
She cannot get a payment for herself on her 2020 tax return if she can be claimed as a dependent. If she indicated that someone can claim her as a dependent, TurboTax would not ask her about the stimulus payment because she is not eligible for it.
