maybe my replies are too obscure but I don't think you are reading them carefully.
I hope it's clear that this situation has nothing to do with your tax return. you don't need an extension.
If your daughter does not intend to file 2023 form1040, there's no reason for her to request an extension of time, and even if she does file Form 4868, without a payment it is no help if for any reason it turns out tax is due.
Since you are not familiar with the required forms for requesting custodian actions, nor what actions to request, you still don't know exactly how custodian will issue the 2024 1099-R.
Even if you ask them now, the customer rep may give you incorrect information.
"The excess Roth IRA removal form does not says whether it will just remove the original contribution amount or including the earning."
It does give you this option. check the form again.
@kaitech3
