A family of Microsoft word processing software products for creating web, email, and print documents.
See my page Repeating Data Using Document Property Content Controls and Other Mapped Content Controls for information on how you can do this.
If you insert controls directly from the Developer Tab, they will not have the ability to repeat unless you "map" them to an XML part. The built-in Document Property Content Controls under quick parts are already mapped and can be renamed and repurposed. Otherwise there are free utilities available (mentioned in the page) to make it easy to map your own custom controls. This is necessary for control types other than plain text and the single date-picker control in the built-in ones, i.e. a checkbox or drop-down control.
Here is a video on how to do this yourself. https://www.youtube.com/watch?v=OtFhIqK0gec
Here is a support article from Microsoft.
Walkthrough: Bind content controls to custom XML parts - Visual Studio (Windows) | Microsoft Learn