After your package has been accepted, you will receive an acceptance email from the Data Editor, who will notify the REStud’s Journal Manager in cc.
In the same email, you will be asked add the Zenodo DOI to the Data Availability Statement (DAS) at the end of the manuscript and to send all production materials to the Journal Manager. The DAS is something like “The data and code underlying this research is available on Zenodo at https://dx.doi.org/[doi].”, but please see other examples here: https://academic.oup.com/journals/pages/authors/preparing_your_manuscript/research-data-policy#data2