How do I insert a column of static text into a nested dataframe in r?

Question

Likely a trivial task for the pros out there, but have not been able to figure out how to insert the text found in the "Slug" column into each of the three nested tables associated with the slug.

![data] (https://i.stack.imgur.com/YClrE.png)

I am just looking to get the Slug value inserted into the nested tables and repeated for each row so I can combine and keep track of associations properly.

Any tips are most welcome! Thank you