RG’s don’t allow duplicate data. The way I usually get around this is to store any necessary data in a list state then extract them into an RG using a filter.
The RG would be of ‘text’ type. To allow duplication each text will be the data’s Unique ID appended or prepended by some other text with a splitter you can use || since it’s just a UID plus something simple.
In the individual cell of the RG, I’ll add a 1px by 1px group that will filter (using Regex) from the list state and store the cell’s data (I usually name these types of groups “CellData-xxx”. I’ll just point the elements in the cell to this CellData group.