If you want to create the exact same item list and create new replenishment rows for each item in it, you can use the Duplicate a Batch feature. Here is how you do that:
Navigate to History, at the bottom of your Open Batches.
Select Closed Batches.
Select the batch you want to duplicate. (The most recent batch will be at the top.)
Once the batch opens, click Duplicate Batch.
After clicking Duplicate, the following pop-up appears:
After reviewing if everything is selected, click Duplicate this Batch, and the batch will move to the List > List & Prep page as an open one.